Question

Three rings P, Q and R are dropped at the same time over identical hollow magnets as shown below :
Which of the following describes the order in which the ring P, Q and R reach the bottom of the magnet?
(a) They arrive in the order P, Q, R.
(b) They arrive in the order P, R, Q.
(c) Rings P and R arrive simultaneously, followed by Q.
(d) Rings Q and R arrive simultaneously, followed by P.

Answer 1

Answer:

(c) Rings P and R arrive simultaneously, followed by Q.

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Answer 2

(C) Rings P and R arrive simultaneously, followed by Q to the bottom of the magnet.

The image given in the question is attached below.

Explanation:

• Ring P is plastic (non-metal) in nature. It does not have any magnetic properties. So, the ring will slide the hollow magnet very easily.
• Ring Q is copper which is a metal. When it is made to slide through the hollow magnet. The ring gets attracted by magnet and it takes much longer time to reach the bottom.
• Ring R is also copper but it is broken. It does not form pole. So, when it is made to slide through the magnet. It reaches without any force attracting it towards magnet.
• Thus, Ring P reaches the bottom first with Ring R then Ring Q reaches finally.