Figure shows a powerful electromagnet arrangement. A copper ring, which is free to move, is placed on the projecting part of the core as shown.
When the key is inserted, the ring

A conducting ring is placed around the core of an electromagnet as shown in fig. qhen key K is pressed, the ring

A copper ring is tied to a string and suspended vertically. On bringing a magnet towards the coil, as shown in the figure-

The figure shows an electromagnetic train signal. When it is switched on, the signal remains in the upward position, whereas when it is switched off, the signal remains in the downward position as shown in the figure. Which part of the electromagnetic train signal is the electromagnet?

In the arrangement shown in figure, there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then:

In the arrangement shown in figure, there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then:

In the arrangement shown in figure,there are two coils wound on a non-conducting cylinderical rod.Initially the key is not inserted.Then the key in inserted and later removes.Then, A. The galvanometer will not deflect B. The galvanometer will deflect in one direction when the key is inserted and in the opposite direction when the keys removed C. The galvanometer will deflect in one direction when the key is inserted and remain still when the key is removed . D. The galvanometer will deflect in one direction when the key is inserted and in the same direction when the key is removed .

If a copper ring is moved quickly towards south pole of a powerful stationary bar magnet, then

If a copper ring is moved quickly towards south pole of a powerful stationary bar magnet, then