Description : Consider tile following statements: [IES-1993; 2002; 2006] Radius of friction circle for a journal bearing depends upon 1. Coefficient of friction 2. Radius of the journal 3. Angular speed of rotation of the shaft Which of the ... ) 1,2 and 3 (b) Only 1 and 2 (c) Only 2 and 3 (d) Only 1 and 3
Last Answer : (b) Only 1 and 2
Description : Consider a car driving around a circular bend in the road. Which of the following CANNOT be constant? w) velocity of car x) speed of car y) nonrelativistic mass of car z) angular momentum of the car about the center of the circle
Last Answer : ANSWER: W -- VELOCITY OF CAR
Description : The angular velocity depends upon the rate of change of the _______. (1) Angular Distance (2) Angular acceleration (3) Angular Displacement (4) torque
Last Answer : (3) Angular Displacement Explanation: The angular velocity is defined as the rate of change of angular displacement and is a vector quantity which specifies the angular speed of an object and the axis about which the object is rotating.
Description : Stopping distance of vehicles : When brakes are applied to a moving vehicle, the distance it travels before stopping is called stopping distance. It is an important factor for road safety and depends on ... the brake with the deceleration of 5m/s2. Find the stopping distance of the car -Science
Last Answer : Here u=72 km/hr = 72×10003600m/s=2072×10003600m/s=20 m/s , v=0 a= -5 m/s2 Now using the relation v2=u2+2asv2=u2+2as 0=(20)2+2×(−5)×s0=(20)2+2×(−5)×s s=40ms=40m
Description : What is the radius of the circle/ I.Ratio of its area to circumference is >7. II.Diameter of the circle is ≤ 32. If the question can be answered with the help of statement I alone, If ... the statements. If the data in either statement I or statement II alone is sufficient to answer the question.
Last Answer : Let the radius of the circle be r units From statement 1: [πr^2]/ [ 2 πr ] > 7 or r > 14 From statement II: 2r≤32 R ≤ 16 Hence, r can be 15 or 16 units Hence, Answer : d
Description : An object moving in a circle of radius ‘r’ with a constant speed ‘v’ has a constant acceleration towards the center equal to A. v²⁄r B. v⁄r C. v²×r D. v×r
Last Answer : v²⁄r
Description : An object travelling with constant velocity has A. constant momentum B. zero momentum C. increasing momentum D. decreasing momentum
Last Answer : constant momentum
Description : An object moving around in a circle is moving with a (a) Uniform velocity (b) Uniform speed (c) Variable velocity (d) Variable speed
Last Answer : Ans:(b)
Description : If an object moves a circular distance ‘s’ of radius ‘r’, then it's angular displacement is A. s⁄r B. r⁄s C. rs D. r2s
Last Answer : s⁄
Description : A satellite is observed to move in a circle about the earth at a constant speed. This means that the force acting upon it is: w) zero x) parallel to the direction of the satellite ... velocity y) perpendicular to the direction of the satellite's instantaneous velocity z) none of the above
Last Answer : ANSWER: Y -- PERPENDICULAR TO THE INSTANTANEOUS DIRECTION OF THE SATTELITE’S VELOCITY
Description : An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm
Last Answer : 3.8 cm
Description : find the circumference of a circle 5ft radius?
Last Answer : 20
Description : If the radius of the circle above is 30 mm. What is the circumference of the circle (Use 3.14.)?
Last Answer : 188.40 mm
Description : If r is the radius of a circle and d is its diameter is an equivalent formula for the circumference C 2r?
Last Answer : Circumference of a circle: 2*pi*radius or diameter*pi
Description : What is the radius of the circle if circumference is 132cm?
Last Answer : Radius of circle: 132/2pi = 21cm to the nearest integer
Description : What is the circumference of a circle with a radius of 67.5 meters?
Last Answer : The circumference of a circle it Pi times the diameter. Thediameter is 2 times the radius. So the diameter is 135 and Pi is3.1416. So the circumference is 424.115 metres.
Description : What is the approximate circumference of a circle with 17.4 cm radius?
Last Answer : Circumference of circle: 2*pi*17.4 = 109 cm approximately
Description : The moment of inertia of a body does not depend upon its – (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : (2) angular velocity Explanation: Moment of inertia is the mass property of a rigid body that determines the torque needed for a desired angular acceleration about an axis of rotation. Moment of inertia ... of moments of inertia of the masses making up the whole object, under the same conditions.
Description : The moment of inertia of a body does not depend upon its (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : angular velocity
Description : If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated? (1) Increases (2) Decreases (3) Unchanged (4) Depends upon the metal
Last Answer : (1) Increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter of the circular hole also increases. Using ... of expansions, we find that the hole radius increases at the same linear rate as the metal.
Last Answer : Increases
Description : What centripetal force is needed to keep a kg object moving at a constant speed of ms in a circle having a radius of 4 m?
Last Answer : What is the answer ?
Description : Angular velocity of second hand of clock is 0.105 rad s-1 and length of hand is 1.8 cm, then speed of tip of hand is A. 0.189 cm s-1 B. 1 cm s-1 C. 0.189 m s-1 D. 2 m s-1
Last Answer : 0.189 cm s-1
Description : Angular separation between two colours of the spectrum depends upon which thing? -General Knowledge
Last Answer : The answer is 'Angle of deviation'
Last Answer : answer:
Description : Angular separation between two colours of the spectrum depends upon which thing?
Last Answer : Angle of deviation
Description : 1. What is Study of growth and development of embryo? 2. What is the minimum permissible age for employment in any factory or mine? 3. Angular separation between two colours of the spectrum depends ... exporting iron ore to Japan? 20. Which site, where Ashokan pillars exist, has the bull capital?
Last Answer : Answer : 1. Embryology 2. 14 years 3. Angle of deviation 4. Aravallis 5. Neolithic Age 6. Vienna 7. Arundhati Roy 8. Sphygmology 9. The Great Himalayan Range 10. Second and seventh 11. ... First 14. Rajasthan 15. Mahavira 16. Thomas Paine 17. Soyabean 18. President 19. Paradeep 20. Rampurva
Description : Time of exposure required for taking photograph of an object depends upon the – (1) brightness of the object (2) skill of photographer (3) proximity of object (4) size of the object
Last Answer : (1) brightness of the object Explanation: In photography, shutter speed or exposure time is the effective length of time a camera's shutter is open. The total exposure is proportional to this ... The correct exposure for a particular object depends on the brightness of the object to be photographed.
Description : Time of exposure required for taking photograph of an object depends upon the (1) brightness of the object (2) skill of photographer (3) proximity of object (4) size of the object
Last Answer : brightness of the object
Description : Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller. (A) Radius of (B) Speed of (C) Fluid velocity leaving (D) None of these
Last Answer : (D) None of these
Description : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity `omega.` the magnetic field produced by
Last Answer : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity ` ... D. `(mu_(0)lambda)/(2omega^(2))`
Description : A disc of radius R rotates with constant angular velocity `omega` about its own axis. Surface charge density of this disc varies as `sigma = alphar^(2
Last Answer : A disc of radius R rotates with constant angular velocity `omega` about its own axis. Surface charge density of ... D. `(mu_(0)alphaomegaR^(3))/(3)`
Description : Find the orbital angular moment of a dipole with angular velocity of 1.6m/s and radius 35cm(in 10-31 order) a) 1.78 b) 8.71 c) 7.18 d) 2.43
Last Answer : a) 1.78
Description : Find the orbital dipole moment in a field of dipoles of radius 20cm and angular velocity of 2m/s(in 10 -22 order) a) 64 b) 76 c) 54 d) 78
Last Answer : a) 64
Description : The mass of an electron in motion depends upon - (1) Direction of motion (2) B its velocity (3) C its velocity of e- (4) D it’s shell number
Last Answer : (2) B its velocity Explanation: The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ.
Description : The loudness of sound depends upon (1) Velocity (2) Pitch (3) Amplitude (4) Wavelength
Last Answer : (3) Amplitude Explanation: Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude).
Description : The ENERGY associated with a photon depends upon the photon's: w) velocity x) frequency y) amplitude z) the brightness of the source from which it comes
Last Answer : ANSWER: X -- FREQUENCY
Description : A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin
Last Answer : Ans:(c)
Description : The non-relativistic mass of an object w) must be the same as its weight x) depends on where you measure it y) does not change with increasing velocity z) is greatest at the poles
Last Answer : ANSWER: Y -- DOES NOT CHANGE WITH INCREASING VELOCITY
Description : An object is projected vertically upward near the surface of the earth. At the very top of its path, the object's velocity is zero, and its acceleration is: w) 0 x) 9.8 meters per second squared DOWNWARD y) 9.8 meters per second squared UPWARD z) depends on the mass of the object
Last Answer : ANSWER: X -- 9.8 METERS PER SECOND SQUARED DOWNWARD
Description : The moment of inertia of a body does not depend upon a.The angular velocity of the body b.Mass of the body c.The distribution of mass in the body d.The axis of rotation of the body e.None of the above
Last Answer : a. The angular velocity of the body
Description : A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r
Last Answer : (4) V²/r Explanation: When a particle is moving in a uniform circular motion with constant speed and radius. the acceleration of the particle is given by v2/r. The particle will exhibit centripetal acceleration.
Description : Two bodies of equal mass are moving in circular paths at equal speed. The first body moves in a circle whose radius is twice as great as that of the second. The ratio of the centripetal or radial acceleration of the first body to that of the second is: w) 1 to 4 x) 1 to 3 y) 1 to 2 z) 1 to 1
Last Answer : ANSWER: Y -- 1 TO 2
Description : A toy train moves in a circle of 8 meters radius with a speed of 4 meters per second. What is the magnitude of the acceleration of the train?
Last Answer : ANSWER: 2 METERS PER SECOND SQUARED
Description : Kinetic energy depends on – (1) the velocity or speed of the moving body. (2) the mass of the moving body (3) the pressure of the moving body (4) both mass and velocity of the moving body
Last Answer : (4) both mass and velocity of the moving body Explanation: Kinetic energy is the energy associated with the movement of objects. The amount of kinetic energy that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object.
Description : Kinetic energy depends on (1) the velocity or speed of the moving body. (2) the mass of the moving body (3) the pressure of the moving body (4) both mass and velocity of the moving body
Last Answer : both mass and velocity of the moving body
Description : When a mass is rotating in a plane about a fixed point, its angular momentum is directed along: (1) the tangent to the orbit (2) a line perpendicular to the plane of rotation (3) the line making an angle of 45° to the plane of rotation (4) the radius
Last Answer : (2) a line perpendicular to the plane of rotation
Description : A boat takes 38 hrs for travelling downstream from point p to point q and coming back to a point r midway between p and q. If the velocity of the stream is 8 km/hr and the speed of the boat in still water is 28 km/hr. What is the distance between p and q? A) 720 B) 640 C) 510 D) 450
Last Answer : ANSWER: A Explanation: Speed downstream = (28 + 8)km/hr = 36 km/hr Speed upstream = (28 – 8)km/hr = 20 km/hr Let the distance between p and q be ‘x’km Then, x/36 + (x/2)/20 = 38 x/36 +x/40 = 38 19x = 13680 X = 720 km Therefore the distance between p and q is 720km