An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?

Related Mcqs:

1. A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be____________?

   A. 10 V
   B. 15 V
   C. 25V
   D. 50V

2. A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?

   A. ωB/r22-r12/Δt
   B. ωB(r2-r1)2/Δt
   C. ωB(r22-r12)/Δt
   D. ωB(r22+r12)/Δt

3. An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?

   A. 20 Wb
   B. 2 Wb
   C. 0.2 Wb
   D. 0.02 Wb

4. Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

   A. 100 N
   B. 400 N
   C. 600 N
   D. 1000 N

5. A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________?

   A. 50 N
   B. 120 N
   C. 240 N
   D. 480 N

6. The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?

   A. Magnetic flux density
   B. Torque
   C. Mutual induction
   D. Motional emf

7. If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________?

   A. Spiral path
   B. Straight line
   C. Curved path
   D. Circular path

8. Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic_____________?

   A. Retaintivity
   B. Permeability
   C. Flux
   D. Hysteresis

9. The emf induced in a coil by a changing magnetic flux may have unit as______________?

   A. ms-1A
   B. ms-2A-1
   C. kgms2A-1
   D. kgm2s-1A-1

10. Which of the following works on torque on the current carrying conductor placed in magnetic field ?

    A. galvanometer
    B. ammeter
    C. voltmeter
    D. all of the above