Types Of Questions

## Electromagnetic Induction

- Wondering what kind of questions that can be asked in next exam? Here you go!
1
Very Short Answer Type Questions 1mark
The magnetic flux through a circuit of resistance R changes by an amount in time t. Then the total quantity of electric charges Q that passes any point in the circuit during the timet is represented by:-
A
B
C
D
Consider the situation as shown in the figure. If the current in long straight conducting wire XY is increased at a steady rate then the induced e.m.f.'s in loops A and B will be
A
clockwise in A, anti clockwise in B
B
anti clockwise in A, clockwise in B
C
clockwise in both A and B
D
anti clockwise in both A and B
A square coil ABCD is lying in xy plane with its centre at origin. A lng straight
wire passing through origin carries a current i = 2t in negative z-direction. The
induced current in the coil is
A
clockwise
B
anticlockwise
C
alternating
D
zero
2
Short Answer Type Questions -I 2marks
Current is induced when the armature of a generator rotates. Slip rings and brushes are the ways and means by which this current is brought to the outer circuit. Is the arrangement necessary if the magnet in generator is made to rotate ?
An average emf of is induced in an inductor when the current in it is changed from in one direction to the same value in the opposite direction in . Find the self-inductance of the inductor.