Two plane mirrors are inclined at an angle of `30^(@)`, the number of images formed are ______.

Two plane mirrors are inclined at an angle of `30^(@)`, the number of images formed are ______.
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Two plane mirrors are inclined at an angle of `30^(@)`, the number of images formed are ______.
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A point object is held between two plane mirrors inclined at `45^@`. What is the number of images seen ?

Description : A point object is held between two plane mirrors inclined at `45^@`. What is the number of images seen ?

Last Answer : A point object is held between two plane mirrors inclined at `45^@`. What is the number of images seen ?

Two plane mirrors are inclined at angle `theta` as shown in figure. If a ray parallel to OB strikes the other mirror at P and finally emerges parallel

Description : Two plane mirrors are inclined at angle `theta` as shown in figure. If a ray parallel to OB strikes the other mirror at P and finally emerges parallel

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How many image can a man see if he stands between two plane mirrors inclined at an angle of 60°?

Description : How many image can a man see if he stands between two plane mirrors inclined at an angle of 60°?

Last Answer : 5

If you stand in a room, where two adjacent walls are covered with plane mirrors, the total number of your images formed will be (a) 2 (b) 3 (c) 4 (d) Infinite

Description : If you stand in a room, where two adjacent walls are covered with plane mirrors, the total number of your images formed will be (a) 2 (b) 3 (c) 4 (d) Infinite

Last Answer : Ans:(b)

A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination `60^(@)` with constant speed 5m/s. A current 2A is fl

Description : A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination `60^(@)` with constant speed 5m/s. A current 2A is fl

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The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m ( a.More than 50 kgm b.50 kgm c.Less than 5 kgm d.15 kgm only e.None of the above

Description : The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m ( a.More than 50 kgm b.50 kgm c.Less than 5 kgm d.15 kgm only e.None of the above

Last Answer : a. More than 50 kgm

A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of maximum compession of spring, neglecting friction to that while considering friction would be a.More than one b.One c.Less than one d.Depends on the stiffness of spring e.None of the above

Description : A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of ... be a.More than one b.One c.Less than one d.Depends on the stiffness of spring e.None of the above

Last Answer : a. More than one

The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be a.45? with horizontal b.30? with vertical c.30? with horizontal d.60? with inclined plane e.45? with inclined plane

Description : The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be a.45? with horizontal b.30? with vertical c.30? with horizontal d.60? with inclined plane e.45? with inclined plane

Last Answer : b. 30? with vertical

A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be a.Zero b.W c.W/2 d.2W e.None of the above

Description : A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be a.Zero b.W c.W/2 d.2W e.None of the above

Last Answer : c. W/2

A ray of light is inclined to one face of a prism at an angle of `60^@`. If angle of prism is `60^@` and the ray deviated through an angle of `42^@` f

Description : A ray of light is inclined to one face of a prism at an angle of `60^@`. If angle of prism is `60^@` and the ray deviated through an angle of `42^@` f

Last Answer : A ray of light is inclined to one face of a prism at an angle of `60^@`. If angle of ... which the emergent ray makes with second face of the prism.

A light ray is incident on a plane mirror placed in a horizontal plane, making an angle of `30^(@)` with the vertical, then the angle between the refl

Description : A light ray is incident on a plane mirror placed in a horizontal plane, making an angle of `30^(@)` with the vertical, then the angle between the refl

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How many images formed by two plane mirror at 180 degree angle?

Description : How many images formed by two plane mirror at 180 degree angle?

Last Answer : 2 is answer

The angle between two plane mirrors of optical square, is (A) 20° (B) 30° (C) 45° (D) 60°

Description : The angle between two plane mirrors of optical square, is  (A) 20°  (B) 30°  (C) 45°  (D) 60° 

Last Answer : (C) 45° 

A real image can be formed by which of the following single mirrors? w) a plane mirror x) a concave spherical mirror y) a convex spherical mirror

Description : A real image can be formed by which of the following single mirrors? w) a plane mirror x) a concave spherical mirror y) a convex spherical mirror

Last Answer : ANSWER: X -- A CONCAVE SPHERICAL MIRROR

A virtual image can be formed by one or more of the following single mirrors? Identify them. w) plane mirror x) concave spherical mirror y) convex spherical mirror z) all of the above

Description : A virtual image can be formed by one or more of the following single mirrors? Identify them. w) plane mirror x) concave spherical mirror y) convex spherical mirror z) all of the above

Last Answer : ANSWER: Z -- ALL OF THE ABOVE (accept: A, B and C) 

In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane at an angle of 45? with c.In lifting up a weight of 100 kg at a constant speed of 3 m/sec d.In lowering the weight at a constant speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2

Description : In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane ... speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2

Last Answer : a. In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec

Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction (A) Along the plane (B) Horizontally (C) Vertically(D) At an angle equal to the angle of friction to the inclined plane

Description : Least force required to draw a body up the inclined plane is W sin (plane inclination + friction  angle) applied in the direction  (A) Along the plane  (B) Horizontally  (C) Vertically  (D) At an angle equal to the angle of friction to the inclined plane 

Last Answer : (D) At an angle equal to the angle of friction to the inclined plane 

The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of (A) Friction (B) Limiting friction (C) Repose (D) Kinematic friction

Description : The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of (A) Friction (B) Limiting friction (C) Repose (D) Kinematic friction

Last Answer : (C) Repose

A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m² when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively (A) 0.5 N/mm² and 30° (B) 0.05 N/mm² and 0° (C) 0.2 N/mm² and 0° (D) 0.05 N/mm² and 45°

Description : A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m² when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of ... N/mm² and 0° (C) 0.2 N/mm² and 0° (D) 0.05 N/mm² and 45°

Last Answer : Answer: Option B

A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as (A) Natural slope line (B) Repose line (C) The line (D) All the above

Description : A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as (A) Natural slope line (B) Repose line (C) The line (D) All the above

Last Answer : Answer: Option D

The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes (A) With the horizontal (B) With the vertical (C) With the perpendicular to the inclined plane of the soil (D) None of these

Description : The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes (A) With the horizontal (B) With the vertical (C) With the perpendicular to the inclined plane of the soil (D) None of these

Last Answer : Answer: Option A

An open vessel of water is accelerated up an inclined plane. The free water surface will (A) Be horizontal (B) Make an angle in direction of inclination of inclined plane (C) Make an angle in opposite direction to inclination of inclined plane (D) Any one of above is possible

Description : An open vessel of water is accelerated up an inclined plane. The free water surface will (A) Be horizontal (B) Make an angle in direction of inclination of inclined plane (C) Make an angle in opposite direction to inclination of inclined plane (D) Any one of above is possible

Last Answer : Answer: Option C

A non-relativistic enters into a right-handed coordinate space with velocity `10^(4) m s^(-1)` at an angle of `60^(@)` with the x-axis in the xy-plane

Description : A non-relativistic enters into a right-handed coordinate space with velocity `10^(4) m s^(-1)` at an angle of `60^(@)` with the x-axis in the xy-plane

Last Answer : A non-relativistic enters into a right-handed coordinate space with velocity `10^(4) m s^(-1)` ... helical trajectory. What is the axis of the helix?

rays of light strike a horizontal plane mirror at an angle of `45^(@)`. At what angle should be a second plane mirror be placed in order that the refl

Description : rays of light strike a horizontal plane mirror at an angle of `45^(@)`. At what angle should be a second plane mirror be placed in order that the refl

Last Answer : rays of light strike a horizontal plane mirror at an angle of `45^(@)`. At what ... ray finally be reflected horizontally from the second mirror.

A proton of mass `1.67xx10^(-27)` kg charge `1.6xx10^(-19) C` is projected in xy-plane with a speed of `2xx10^(6) m//s` at an angle of `60^(@)` to the

Description : A proton of mass `1.67xx10^(-27)` kg charge `1.6xx10^(-19) C` is projected in xy-plane with a speed of `2xx10^(6) m//s` at an angle of `60^(@)` to the

Last Answer : A proton of mass `1.67xx10^(-27)` kg charge `1.6xx10^(-19) C` is projected in xy-plane with a speed ... radius 0.14 m and time period `1.0xx10^(-7)s`

Why do mirrors flip images side-to-side but not top-to-bottom?

Description : Why do mirrors flip images side-to-side but not top-to-bottom?

Last Answer : answer:”When we look in a mirror, from experience we know that “mirror right” represents “my left” and vice versa.” Uh. No. That is what happens when another person is standing in front of you. In the mirror, the hand you see on the right side, is your right hand.

An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Description : An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the ... The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Last Answer : d. 0.5305

A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move down the plane to that when it move up the plane would be in the regions a.8 ? 10 b.5 ? 7 c.2 ? 3 d.4 ? 6 e.10 ? 13

Description : A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move ... be in the regions a.8 ? 10 b.5 ? 7 c.2 ? 3 d.4 ? 6 e.10 ? 13

Last Answer : b. 5 ? 7

A ray of light is incident at an angle of `60^(@)` on one face of a prism of angle `30^(@)`. The ray emerging out of the prism makes an angle of `30^(

Description : A ray of light is incident at an angle of `60^(@)` on one face of a prism of angle `30^(@)`. The ray emerging out of the prism makes an angle of `30^(

Last Answer : A ray of light is incident at an angle of `60^(@)` on one face of a prism of angle `30^(@)` ... of `30^(@)` with the incident ray. The emergent ray is

If critical angle for a material to air is `30^(@)`, the refractive index of the material will be

Description : If critical angle for a material to air is `30^(@)`, the refractive index of the material will be

Last Answer : If critical angle for a material to air is `30^(@)`, the refractive index of the material will be

The type of mirrors used in the headlamp of cars is – (1) Parabolic concave (2) Plane (3) Spherical convex (4) Cylindrical concave

Description : The type of mirrors used in the headlamp of cars is – (1) Parabolic concave (2) Plane (3) Spherical convex (4) Cylindrical concave

Last Answer : (1) Parabolic concave Explanation: Curved mirror that reflects light from its inner surface, the curve being inward. It may be either circular or parabolic in section. A concave mirror converges parallel light ... is not too close to the mirror. A real image is formed at the point of convergence.

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards: (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Description : A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The ... , Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Last Answer : (c) Concave, Plane, Convex

The type of mirrors used in the headlamp of cars is (1) parabolic concave (2) plane (3) spherical convex (4) cylindrical concave

Description : The type of mirrors used in the headlamp of cars is (1) parabolic concave (2) plane (3) spherical convex (4) cylindrical concave

Last Answer : parabolic concave

How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling? -Do You Know?

Description : How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling? -Do You Know?

Last Answer : answer:

How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling?

Description : How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling?

Last Answer : 7

1. In the leaf of tobacco what is found? 2. Anglo-Indian representatives in the Lok Sabha are nominated in terms of which Article? 3. How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling? 4. Who founded the French School of Regional Geography? 5. The bitterest war of succession under the great Mughals was fought among whose sons?

Description : 1. In the leaf of tobacco what is found? 2. Anglo-Indian representatives in the Lok Sabha are nominated in terms of which Article? 3. How many image will be formed if two mirrors are fitted adjacent ... to the forest been caused by acid rain? 20. Who was named as Mira Ben by Mahatma Gandhi?

Last Answer : Answer : 1. Nicotin 2. 331 3. 7 4. Paul Vidal de in Blache 5. Shahjahan 6. Golf 7. Vishwamitra Award 8. Bract 9. Melbourne 10. Ryotwari 11. By the President 12. Ethane 13. 1957 14. 36,000 km 15. Calcutta 16. Charan Singh 17. Small intestine 18. Every five years 19. Poland 20. Madeline Slade

In the Argand plane, the vector z = 4 - 3i is turned in the clockwise sense through 180^@` and stretched three times. The complex number represented n

Description : In the Argand plane, the vector z = 4 - 3i is turned in the clockwise sense through 180^@` and stretched three times. The complex number represented n

Last Answer : In the Argand plane, the vector z = 4 - 3i is turned in the clockwise sense through 180^@` and stretched three ... `12-9i` C. `-12-9i` D. `12-9i`

Two bodies of mass 6 kg and 9 kg are connected with a light inextensile string passing over a smooth pulley with one of the bodies on a smooth inclined plane (θ = 30°) and the other hanging freely from the other end. Show that the time taken by 9 kg to pull 6 kg up the entire length is half the time taken by 6 kg to pull 9 kg over the same plane.

Description : Two bodies of mass 6 kg and 9 kg are connected with a light inextensile string passing over a smooth pulley with one of the bodies on a smooth inclined plane (θ = 30°) and the other hanging freely from the ... kg up the entire length is half the time taken by 6 kg to pull 9 kg over the same plane.

Last Answer : Given: Mass of body A (mA) = 6 kg Mass of body B (mB) = 9 kg Angle of inclination of the plane (θ) = 30° Let's assume that the acceleration of body A (aA) and body B (aB) are in opposite ... we know that the time taken (t) is given by the formula: t = √(2d/a), where d is the distance travelled

A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time taken to reach the ground b.Kinetic energy at the ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

Description : A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time ... ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

Last Answer : d. Velocity while touching the ground

Two metallic blocks having masses in the ratio 2:3 are made to slide down a frictionless inclined plane starting

Description : Two metallic blocks having masses in the ratio 2:3 are made to slide down a frictionless inclined plane starting from rest position. When the blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio : (A) 2:3 (B) 3:5 (C) 3:2 (D) 7:4

Last Answer : Two metallic blocks having masses in the ratio 2:3 are made to slide down a frictionless inclined plane starting from rest position. When the blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio : 2:3

A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height a.block A will have higher velocity than block B while hitting the ground b.block B will hit the ground earlier. c.both will hit the ground simultaneously d.block A will hit the ground earlier e.107 dynes

Description : A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height a.block A will have higher velocity than block B while hitting the ... . c.both will hit the ground simultaneously d.block A will hit the ground earlier e.107 dynes

Last Answer : b. block B will hit the ground earlier.

The principle of conservation of energy cannot be applied in case of a.Flow of heat through a metal b.Ideal flow of water in a pipe c.Simple pendulum d.Sliding of a particle along inclined plane with friction e.A particle moving in gravitational field

Description : The principle of conservation of energy cannot be applied in case of a.Flow of heat through a metal b.Ideal flow of water in a pipe c.Simple pendulum d.Sliding of a particle along inclined plane with friction e.A particle moving in gravitational field

Last Answer : e. A particle moving in gravitational field

A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating forward while going around a curve of radius equal to the maximum height attained by the ball c.107 dynes d.accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Last Answer : a. moving at constant velocity

The diagram below shows a simple machine in use. Study it, then answerquestion 6.The simple machine shown above is an example of a/an(B)(A) inclined plane.(D) wedge.(C)?

Description : The diagram below shows a simple machine in use. Study it, then answerquestion 6.The simple machine shown above is an example of a/an(B)(A) inclined plane.(D) wedge.(C)?

Last Answer : auscultation (listen

How can inclined plane and amp a pulley r used to change the amount of force needed to move an object?

Description : How can inclined plane and amp a pulley r used to change the amount of force needed to move an object?

Last Answer : Feel Free to Answer

What are the features of inclined plane?

Description : What are the features of inclined plane?

Last Answer : Feel Free to Answer

A block P released from the top of a smooth inclined plane slides down the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be true if the friction offered by air is negligible? (a) Both blocks will reach the ground at the same time (b) Block P will reach the ground earlier than block Q (c) Both blocks will reach the ground with the same speed (d) Block Q will reach the ground with a higher speed than block P

Description : A block P released from the top of a smooth inclined plane slides down the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be ... with the same speed (d) Block Q will reach the ground with a higher speed than block P

Last Answer : Ans:(c)

A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal. a) PSinθ(Sinθ+Cosθ)/hl b) P(Sinθ+Cosθ)/hl c) Pcosθ(Sinθ+Cosθ)/hl d) None of the listed

Description : A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal. a) PSinθ(Sinθ+Cosθ)/hl b) P(Sinθ+Cosθ)/hl c) Pcosθ(Sinθ+Cosθ)/hl d) None of the listed

Last Answer : a) PSinθ(Sinθ+Cosθ)/hl

A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal. a) PSinθ(Sinθ+Cosθ)/hl b) P(Sinθ+Cosθ)/hl c) Pcosθ(Sinθ+Cosθ)/hl d) None of the listed

Description : A force 2P is acting on the double transverse fillet weld. Leg of weld is h and length l. Determine the shear stress in a plane inclined at θ with horizontal. a) PSinθ(Sinθ+Cosθ)/hl b) P(Sinθ+Cosθ)/hl c) Pcosθ(Sinθ+Cosθ)/hl d) None of the listed

Last Answer : a) PSinθ(Sinθ+Cosθ)/hl