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1.
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
2.
A coil of N =100 turns carries a current I =5 A and creates a magnetic flux 
per turn. The value of its inductance L will be
per turn. The value of its inductance L will be
3.
A transformer works on the principle of
4.
The magnetic field in the cylindrical region shown in figure increases at a constant rate of 
. Each side of the square lop 
has a length of 
and resistance of 
. Find the current in the wire 
if the switch 
is closed
. Each side of the square lop has a length of and resistance of . Find the current in the wire if the switch is closed
5.
A boat is moving due east in a region where the earth's magnetic field is 
due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50
, the magnitude of the induced emf in the wire of aerial is
due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50, the magnitude of the induced emf in the wire of aerial is
6.
An electric potential difference will be induced between the ends of the conductor shown in the diagram, when the conductor moves in the direction
7.
The inductance of a solenoid 
long of cross-sectional area 
and with 500 turns is
long of cross-sectional area and with 500 turns is
8.
In 
-
circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula
- circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula
9.
A transformer connected to 
line shows an output of 
at 
. The efficiency is 100%. The current drawn from the line is
line shows an output of at . The efficiency is 100%. The current drawn from the line is
10.
An axle of truck is 2.5 m long. If the truck is moving due north at 30 at a place where the vertical component of the earth's magnetic field is 90
T, the potential difference between the two ends of the axle is
at a place where the vertical component of the earth's magnetic field is 90T, the potential difference between the two ends of the axle is