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A boy set up an experiment as shown in the diagram. As he slide the magnet across the wooden board the ball bearing followed the magnet’s momentum and direction. What does the experiment show?
i) Magnetic force can be seen due to friction between ball bearing and wooden board.
ii) Friction and gravity help to move the ball bearing
iii) The ball bearing is made of a magnetic substance
iv) Magnetic force on pass through the wooden board

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(iii) and (iv) are correct

(ii), (iii) and (iv) are correct

(i) and (ii) are correct

(i), (iii) and (iv) are correct

answer is B.

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Detailed Solution

The ball bearing is made of a magnetic substance
Magnetic force on pass through the wooden board.

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