A coil having 100 turns and the area 0.2 m^-2 is placed normally in a magnetic field. the magnetic field changes from 0.20 Wbm^-2 to 0.60 Wbm^-2 at a uniform rate over a period of 0.01 s .  calculate the induced emf in the coil.

A circular coil of radius 8cm and 20 turns rotates about its vertical diameter with the angular speed of 50 s^-1 in a uniform horizontal magnetic field of magnitude 3 * 10^-2 T . find the maximum and average value of the emf induced in the coil.

Kamla paddles a stationary bicycle . the paddles of the bicycle are attached to a 100 turn coil of area 0.10 m^2 .  The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil?

Derive the expression for (1) induced emf , (2) induced current  , when a conductor of length L is moved with a uniform velocity v , normal to a uniform magnetic field B .  assume the resistance of the conductor to be R.

In a 100  turn coil a magnetic flux of 8 * 10^-4 Wb is linked when a current of 2A is sent. what is the self inductance of the coil?

A circular copper disc 10cm in radius rotates at 20 pie rad/s about an axis through its centre and perpendicular to the disc. a uniform magnetic field of 0.2 T acts perpendicular to the disc. 

         (a) calculate the potential difference developed between the axis of the disc and the rim.
         (b) what is the induced current of the resistance of the disc is 2 ohm.

A coil Q is connected to low voltage bulb B and placed near another coil P as shown in fig. give reasons to explain the following observations.
(a) the bulb 'B' lights.
(b) Bulb gets dimmer if the coil Q is moved towards left.

fig. below shows planar loops of different shapes moving out of or into a region of a magnetic field which is directed normal to the plane of the loop away from the reader. determine the direction of induced current in each loop using lenz's rule.

ELECTRIC POTENTIAL AT ANY POINT DUE TO AN ELECTRIC DIPOLE...........

MAGNETIC FIELD DUE TO TORROID..........

MAGNETIC FIELD DUE TO SOLENOID..........

AMPERE CIRCUITAL LAW.......

MOVING COIL GALVANOMETER..........

expression for energy stored in a solenoid.....

expression for self inductance of a long solenoid.........

conservation of energy using lenz's rule....

Determine the direction of induced current produced in the coil if the current flowing in the wire XY is
1- constant
2- increasing
3- decreasing

LENZ'S RULE......

MAGNETIC FLUX.......

A wheel with 10 mettalic spokes each 0.5m long is rotated with a speed of 120rev/min in a plane normal to the earth's magnetic field at the place. if the magnitude of the field is 0.4 gauss  , what is the induced EMF between the axle and the rim of the wheel?