As per Faraday’s laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________?

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. 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_____________?

   A. Induced current B. Eddy current C. Back emf D. None of the above...

3. If current in a conductor increases then according to Lenz’s law self-induced voltage will____________?

   A. aid the increasing current B. tend to decrease the amount of cur-rent C. produce current opposite to the in-creasing current D. aid the applied voltage...

4. The magnitude of the induced e.m.f. in a conductor depends on the______________?

   A. flux density of the magnetic field B. amount of flux cut C. amount of flux linkages D. rate of change of flux-linkages...

5. 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...

6. 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...

7. Which of the following circuit element stores energy in the electromagnetic field ?

   A. Inductance B. Condenser C. Variable resistor D. Resistance...

8. The direction of induced e.m.f. can be found by_____________?

   A. Laplace’s law B. Lenz’s law C. Fleming’s right hand rule D. Kirchhoff s voltage law...

9. Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is___________?

   A. 5 mH B. 10 mH C. 5 H D. 10 H...

10. The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit Weber turns

    A. Yes B. No...