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1.
An AC generator of 
having internal resistance 
and external resistance 
. What is the power developed in the external circuit
having internal resistance and external resistance . What is the power developed in the external circuit
2.
A conducting wire is moving towards right in a magnetic field 
. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
3.
A square loop of wire, side length 10 cm is placed at angle of 45
with a magnetic field that changes uniformly from 0.1 T to zero in 0.7 s. The induced current in the loop (its resistance is 1 
is
with a magnetic field that changes uniformly from 0.1 T to zero in 0.7 s. The induced current in the loop (its resistance is 1 is
4.
A wheel with ten metallic spokes each 
long is rotated with a speed of 
in a plane normal to the earth's magnetic field at the place. If the magnitude of the field is 0.4 gauss, the induced e.m.f. between the axle and the rim of the wheel is equal to
long is rotated with a speed of in a plane normal to the earth's magnetic field at the place. If the magnitude of the field is 0.4 gauss, the induced e.m.f. between the axle and the rim of the wheel is equal to
5.
Which type of losses donot occur in the transformer?
6.
An transformer is employed to reduce to 
. The primary draws a current of 
and the secondary 
. The efficiency of the transformer is
to . The primary draws a current of and the secondary . The efficiency of the transformer is
7.
The momentum in mechanics is expressed as 
The analogous expression in electricity is
The analogous expression in electricity is
8.
The equivalent inductance of two inductance is 
when connected in parallel and 
when connected in series. The difference between the two inductances is
when connected in parallel and when connected in series. The difference between the two inductances is
9.
There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then
10.
Lenz's law applies to