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Subject :NSO    Class : Class 7

Bob is trying to turn rod P into a magnet by the following stroking method. He finds that this method does not work. Which two of the following could be the possible explanations?

(1) He should stroke rod P with the south-pole instead.
(2) The bar magnet is not touching rod P.
(3) The bar magnet strokes rod P in more than one direction.
(4) Rod P is not a magnetic material.
(a) 1 and 2
(b) 2 and 3
(c) 2 and 4
(d) 3 and 4

The magnet is CLEARLY not touching the Rod P. Isn't the answer B and not D?

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