×
Detail Form
We will send your result on your email id and phone no. please fill detail
1.
Fan is based on
2.
The number of turns of primary and secondary coils of a transformer are 5 and 10 respectively and the mutual inductance of the transformer is 
. Now the number of turns in the primary and secondary of the transformer are made 10 and 5 respectively. The mutual inductance of the transformer in 
will be
. Now the number of turns in the primary and secondary of the transformer are made 10 and 5 respectively. The mutual inductance of the transformer in will be
3.
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an ac supply of 
and the current flowing in it is 
. The voltage and the current in the secondary are
and the current flowing in it is . The voltage and the current in the secondary are
4.
If the current is halved in a coil, then the energy stored is how much times the previous value
5.
A 50 mH coil carries a current of 2 A, the energy stored in joule is
6.
A coil has an area of 
and it has 800 turns. It is placed perpendicularly in a magnetic field of strength 
, it is rotated through 
in 
. The average e.m.f. induced in the coil is
and it has 800 turns. It is placed perpendicularly in a magnetic field of strength , it is rotated through in . The average e.m.f. induced in the coil is
7.
A cylindrical bar magnet is kept along the axis of a circular coil. The magnet is rotated about its axis such that north pole faces the coil. The induced current in the coil
8.
A circular wire of radius 
rotates about its own axis with angular speed 
in a magnetic field 
perpendicular to its plane, then the induced emf is
rotates about its own axis with angular speed in a magnetic field perpendicular to its plane, then the induced emf is
9.
Which of the following phenomena is utilised in the construction of mouth piece of a telephone now a days?
10.
A conducting rod 
of length 
is rotated about a point 
in a uniform magnetic field 
directed into the paper. 
and 
. Then
of length is rotated about a point in a uniform magnetic field directed into the paper. and . Then