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Chapter 15 - Electromagnetic Induction - 5
1.
The phenomena in which a change of current in a coil induces an emf in itself is called:
a) Electromagnetic induction
b) Electric induction
c) Self induction
d) Mutual induction
2.
The SI unit of mutual inductance is:
a) V.A/s
b) A/Vs
c) V
d) Vs/A
3.
The condition of step up transformer is:
a) Ns is smaller than Np
b) Ns=Np
c) Ns is greater than Np
d) Vp is greater than Vs
4.
Generator works on the principle of
a) Direction of induced emf
b) Ns is smaller than Np
c) Torque acting on the motor’s coil
d) Step down
5.
Electric Motor converts
a) Step down
b) Mutual induction
c) Electrical energy into mechanical energy
d) Direction of induced emf
6.
Ns is smaller than Np
a) Step down
b) Weber
c) Electrical energy into mechanical energy
d) Mutual induction
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