From the diagram given below:

What will you observe when-
(1) the magnet is dropped into the coil.
(2) the number of turns of the coil is increased?

From the diagram given below: What will be the direction of current flowing through the coil when the magnet is dropped in? (Clockwise or anticlockwise).

If number of turns in the coil is increased, how will brightness change ?

How is mutual inductance of a pair of coils affected when (i) separation between the coils in increased, (ii) the number of turns of each coil is increased , (iii) a thin iron sheet is placed between the two coils, other factors remaining the same ? Explain your answer in each case.

A coil with an average diameter of 0.02 m is placed perpendicular to a magnetic field of 6000 T. If the induced e.m.f. is 11 V when magnetic field is changed to 1000 T in 4 s, what is the number of turns in the coil ?

You are given two coils A and B. Through each coil, the initial magnetic flux is same. In which coil, the em.f. induced will be more if the number of turns in the coil A is twice that of the coil B and the magnetic flux is reduced to zero in coil A, two times faster than in coil B?

Two coaxial plane coils, each of n turns of radius a, are separated by a distance a. calcualte the magnetic field on the axis at the point midway between them when a current l flows in the same sense through each coil. Electrons in a colou television tube are accelerated through a potential difference of 25 kV and then deflected by 45^(@) in the magnetic field between the two coils described above. If a is 100 mm and the maximum current available for the coils is 2A, estimate the number of turns which the coils must have.

A coil of insulate copper wire is connected to a galvanometer. What will happen if a bar magnet is (i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil ?

A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The cross-sectional area of the coil is equal to S = 3.0 mm^2 , the number of turns is N = 60 . When the coil turns through 180^@ about its diameter, a galvanometer connected to the coil indicates a charge q = 4.5muC flowing through it. Find the magnetic induction magnitude between the poles, provided the total resistance of the electric circuit equals R = 40 Omega .

Current is flowing in a coil of area A and number of turns N, then magnetic moment of the coil ,M is equal to