Chapter Six
Electromagnetic induction
Example 6.2
A square loop of side 10 cm and resistance 0.5 Ω is placed vertically in the east west plane. A Uniform magnetic field of 0.10 T is set up across the plane in the north-west direction. The magnetic field is decreased to zero in 0.70s at a steady rate. Determine the magnitudes of induced emf and current during this time-interval.
Example 6.3
A circular coil of radius 10cm, 500 turns and resistance 2Ω is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. It is rotated about its vertical diameter through 180 degree in 0.25s. Estimate the magnitudes of the emf and current induced in the coil. Horizontal component of the earth's magnetic field at the place is 3.0 x 10-5 T.