What is electromagnetic induction ? A coil of insulated copper wire is connected to a galvanometer. What will happen in the galvanometer if a strong bar magnet is . .. (1) pushed into the coil ? (2) withdrawn from inside the coil ? (3) held stationary inside the coil ?

(a) What happens if a bar magnet is cut into two pieces: (i) transverse to its length, (ii) along its length ?

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^(-5) m^2 , and the free electron density in copper is given to be about 10^29 m^(-3) .)

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, ( c) average force on each electron in the coil due to the magnetic field ? (The coil is made of copper wire of cross-sectional area 10^(-5)m^(2) , and the free electron density in copper is given to be about 10^(29)m^(-3) .)

A coil having 10 Am^2 magnetic moment is placed in a vertical plane & is free to rotate about its horizontal axis coincides with its diameter. A uniform magnetic field of 2T in the horizontal direction exists such that initially the axis of the coil is in the direction of the field. The coil rotates through an angle of 90^@ under the influence of magnetic field. The moment of Inertia of coil is 0.1 kg m^2 . What will be its angular speed?

(a) A closed loop is held stationary in the magnetic field between the north and south poles of two permanent magnets held fixed. Can we hope to generate current in the loop by using very strong magnets ? (b) A closed loop moves normal to the constant electric field between the plates of a large capacitor. Is a current induced in the loop (i) when it is wholly inside the region between the capacitor plates (ii) when it is partially outside the plates of the capacitor? The electric field is normal to the plane of the loop. (c) A rectangular loop and a circular loop are moving out of a uniform magnetic field region (Figure) to a field-free region with a constant velocity v. In which loop do you expect the induced emf to be constant during the passage out of the field region? The field is normal to the loops.

I amount of current is passed through a coil with N turns. Magnetic flux linked with the coil is ......