Description : The electric force between two charges placed in air is 2 Newton. When placed in a medium of ∈r = 80, the force reduced to: (a) 0.029 N (b) 0.025 N (c) 0.03 N (d) 0.04 N
Last Answer : (b) 0.025 N
Description : The number of electric field lines passing through a certain element of area is called: (a) Electric lines of force (b) Electric intensity (c) Electric flux (d) None of these
Last Answer : (c) Electric flux
Description : The practical application of electrostatic is: (a) Photocopier (b) X-rays machines (c) Laser (d) All of above 42. The electric field lines emerge from the charges in: (a) Three dimensions (b) Two dimensions (c) One dimension (d) All of above
Last Answer : (a) Photocopier
Description : When an iron piece is placed in a magnetic field (a) the magnetic lines of force will bend away from their usual paths in order to go away from the piece (b) the magnetic lines of force will bend ... to pass through the piece (c) the magnetic field will not be affected (d) the iron piece will break
Last Answer : (b) the magnetic lines of force will bend away from their usual paths in order to pass through the piece
Description : When the field is strong, the lines of force are: (a) Closer (b) Parallel (c) Farther (d) All of above 45. The electric lines of force determine the strength of an: (a) Gravitational field (b) Constant field (c) Magnetic field (d) Electric field
Last Answer : d) Electric field
Description : The electric field exist around: (a) Charges (b) On the left side (c) At the –ve charge (d) At the +ve charge
Last Answer : (a) Charges
Description : The space around the charge within which other charges are influenced by it is called: (a) Electric field (b) Magnetic field (c) Electric flux (d) Electric intensity
Last Answer : a) Electric field
Description : When the medium is insulator the electrostatic force between the charges is: (a) Decreased (b) Zero (c) Increased (d) None of above
Last Answer : (a) Decreased
Description : A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be (a) zero (b) BLI (c) B2LI (d) BLI2
Last Answer : (a) zero
Description : A magnetic screw placed in a non-uniform magnetic field experiences a) force and torque b) only torque c) only force d) None of these
Last Answer : a) force and torque
Description : A current of 5.8 A flows through a 0.25 m long straight conductor which is kept perpendicular in a region of uniform magnetic field of 3.7 T . The force on conductor is a) 5.4 N b) 2.4 N c) 3.4 N d) 6.4 N
Last Answer : a) 5.4 N
Description : The conventional current is due to the flow of a. atoms and molecules b. positive charges c. negative charges d. both b and c
Last Answer : b. positive charges
Description : In liquids and gases the current is due to the motion a. negative charges b. positive charges c. both negative and positive charges d. neutral particles
Last Answer : c. both negative and positive charges
Description : Why would curved or rounded lines of latitude make it difficult for sailors to accurately draw straight-line compass courses on maps?
Last Answer : Need answer
Description : In psychrometric chart, dew point temperature lines are A. horizontal B. vertical C. curved D. straight lines slopping downwards to the right
Last Answer : ANSWER : A
Description : For operating rotavator in trashy soils, which lines are better? (a) L-shaped (b) Hook shaped (c) Backward curved (d) Straight blade
Last Answer : (a) L-shaped
Description : The word “Linear” means that the relationships are represented by _____ a. Diagonal lines b. Curved lines c. Straight lines d. Slanting lines
Last Answer : c. Straight lines
Description : The direction of magnetic lines of force is (a) from south pole to north pole (b) from north pole to south pole (c) from one end of the magnet to another (d) none of the above
Last Answer : (b) from north pole to south pole
Description : A permeable substance is one (a) which is a good conductor (6) which is a bad conductor (c) which is a strong magnet (d) through which the magnetic lines of force can pass very easily
Last Answer : (d) through which the magnetic lines of force can pass very easily
Description : At a point halfway between two identical point charges, the electric field is equal to: w) zero x) half its maximum value y) its maximum value z) pointing away from the two charges
Last Answer : ANSWER: W -- ZERO
Description : A magnetic field exists around (a) iron (b) copper (c) aluminium (d) moving charges
Last Answer : (d) moving charges
Description : Which of the following statement is correct: (a) Similar charges attract each other (b) Similar charges attract and repel each other (c) Similar charges repel each other (d) Similar charges neither attract nor repel 9. Metals are good conductors of electricity because they have:
Last Answer : (c) Similar charges repel each other
Description : The branch of physics which deals with the charges at rest: (a) Current electricity (b) Electromagnetism (c) Electrostatics (d) Nuclear physics
Last Answer : (c) Electrostatics
Description : The electric intensity at a distance of 1m from the point charge is 1μC is: (a) 9 × 109 N/C (b) 9 × 106 N/C (c) 9 × 103 N/C (d) 9 N/C
Last Answer : c) 9 × 103 N/C
Description : The force between two long parallel conductors is inversely proportional to (a) radius of conductors (b) current in one conductor (c) product of current in two conductors (d) distance between the conductors
Last Answer : (d) distance between the conductors
Description : The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is (a) proportional to 7 (b) proportional to X (c) proportional to distance between the conductors (d) inversely proportional to I
Last Answer : (b) proportional to X
Description : If the distance between the two charge bodies is halved, the force between them becomes: (a) Half (b) Four time (c) One fourth (d) Doubled
Last Answer : (c) One fourth
Description : The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, ... and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor
Last Answer : (d) current, magnetic field and direction of force on a conductor
Description : The force per unit charge is called: (a) Electric field (b) Electric field intensity (c) Electric potential energy (d) Electric potential
Last Answer : b) Electric field intensity
Description : Michael Faraday was known by his work on: (a) Electric force (b) Weak nuclear force (c) Strong nuclear force (d) Gravitational force
Last Answer : (a) Electric force
Description : A straight rod of mass m and lenth `L` is suspended from the identical spring as shown in the figure The spring stretched by a distance of `x_(0)` due
Last Answer : A straight rod of mass m and lenth `L` is suspended from the identical spring as shown in the figure The spring ... `(mgR)/(2LE)` D. `(mgR)/(E)`
Description : Two identical conducting wires `AOB and COD` are placed at right angles to each other. The wire `AOB` carries an electric current `I_(1) and COD` carr
Last Answer : Two identical conducting wires `AOB and COD` are placed at right angles to each other. The wire `AOB` carries an electric ... )^(2)+I_(2)^(2))^(1//2)`
Description : The termssinglemode andmultimode are bestdescribes as a. the number of fibers placed into a fiber-optic cable b. the number of voice channels each fiber can support c.thenumber ofwavelengths eachfiber cansupport d. the index number
Last Answer : c.thenumber ofwavelengths eachfiber cansupport
Description : A fuse is placed in series with the cireuit to protect against a. high power b. high voltage c. high current d. over heating
Last Answer : d. over heating
Description : The graphical representation of Ohms law is a. hyperbola b. Ellipse c. parabola d. straight line
Last Answer : d. straight line
Description : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on each wire due to the other is
Last Answer : Figure shows, three long straight wires parallel and equally speed with identical currents. Then, the force acting on ... `F_(b) gt F_(a) gt F_(c)`
Description : A charge of 2 X 10 -7 C is acted upon by a force of 0.1N. Determine the distance to the other charge of 4.5 X 10 -7 C, both the charges are in vacuum. a) 0.03 b) 0.05 c) 0.07 d) 0.09
Last Answer : d) 0.09
Description : The electrostatic energy in an electric field does not depend on which of the following? a) Magnitude of charges b) Permittivity c) Applied electric field d) Flux lines
Last Answer : c) Applied electric field
Description : In certain city the Taxi charges comprise of a fixed charge and the charge of the distance travelled. A person paid Rs.156 for a journey of 16 km and another person paid Rs.204 for the journey of 24 km. The amount paid by a passenger who has travelled 30 km is (A) 236 (B) 240 (C) 248 (D) 256
Last Answer : Answer: B
Description : The deflection system of a TV picture tube makes use of a) magnetic deflection b) electric deflection c) Both (a) and (b) d) None of these
Last Answer : a) magnetic deflection
Description : Line spectrum is obtained on the screen in the form of lines if the slit in front of the source is a) narrow square b) broad square c) narrow rectangle d) broad rectangle
Last Answer : c) narrow rectangle
Description : Find the electric field intensity of two charges 2C and -1C separated by a distance 1m in air. a) 18 X 10 9 b) 9 X 10 9 c) 36 X 10 9 d) -18 X 10 9
Last Answer : b) 9 X 10 9
Description : In case of absorption, both the operating and equilibrium lines will be straight for (A) Isothermal operation (B) Dilute solutions (C) Dilute solutions and isothermal operation (D) None of these
Last Answer : (C) Dilute solutions and isothermal operation
Description : If the distance between two charges is halved, then the force between them becomes (a) Half (b) Double (c) Four times (d) One-fourth
Last Answer : Ans:(c)
Description : Electrical force exerted by two point charges on each other is inversely proportional to A. sum of their charges B. product of their charges C. distance between them D. square of distance between them
Last Answer : square of distance between them
Description : Two negative point charges are 2 meters apart and repel each other with a force of 2 newtons. When the distance between the charges is doubled, the force between them is w) one fourth as great x) one half as great y) twice as great z) four times as great
Last Answer : ANSWER: W -- ONE FOURTH AS GREAT
Description : The absorption ofradiowaves bythe atmosphere depends on a. their frequency b. their distance from the transmitter c. the polarization of the waves d. the polarization of the atmosphere
Last Answer : a. their frequency
Description : Thegroundwave eventuallydisappears, as onemoves awayfromthetransmitter, because of a. interference from the sky wave b. loss of line-of-sight conditions c. maximumsingle-hop distance limitation d. tilting
Last Answer : d. tilting
Description : Distancesnearthe skip distance should beused forthe sky-wave propagation a. to avoid tilting b.topreventsky-wave andupper rayinterference c. to avoid the Faraday effect d. so as nor to exceed the critical frequency
Last Answer : b.topreventsky-wave andupper rayinterference
Description : High-frequencywaves are a. absorbed by the F2 layer b. reflected by the D layer c. capable of use for long-distance communications on the moon d. affected by the solar cycle
Last Answer : d. affected by the solar cycle