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Chapter 15 - Electromagnetic Induction - 3
1.
If a closed metallic loop is moved across a magnetic field then:
a) Magnet will repel the loop
b) Current is produced in it
c) Magnet will attract the loop
d) No current is produced
2.
The phenomena by which an induced emf is produced in the conductor due to change of flux through it is called:
a) Electromagnetic induction
b) All of the above
c) Electric polarization
d) Electrostatic induction
3.
The current produced due to phenomena of electromagnetic induction is called:
a) Negative current
b) Induced current
c) Conventional current
d) Positive current
4.
Identify the phenomena by which an induced emf could be generated:
a) By moving a conductor across a magnetic field
b) All of above
c) By rotating a coil in a magnetic field
d) By moving a magnet across a stationary coil
5.
The induced current can be increased by:
a) By moving the coil faster through the field
b) By increasing the strength of field
c) All of the above
d) Increasing the number of turns of coil
6.
The emf produced by motion of a coil across a magnetic field is called:
a) Induced emf
b) Self induced emf
c) Emf
d) Motional emf
7.
The magnitude of motional emf of a conductor of length L and velocity V is equal to:
a) VB/L
b) VL/B
c) QVBL
d) VBL
8.
If velocity of conductor moving through a strong magnetic field is zero then its motional emf will be:
a) VBL
b) QVB
c) Zero
d) IBL
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