Question

Three rings P, Q and R are dropped at the same time over identiful 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

Plastic is non magnetic substance and open ring does not form magnetic poles so due to induction only ring Q will experience retarding force by forming magnetic poles.