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NTSE Stage 2 SAT 2015 Question Paper

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Question : 31

Total: 100

A small spherical ball of mass ‘m’ is used as the bob of a pendulum. The work done by the force of tension on its displacement is W1 The same ball is made to roll on a frictionless table. The work done by the force of normal reaction is W2 . Again the same ball is given a positive charge ‘g’ and made to travel with a velocity ‘v’ in a megnetic field B. The work done by the force experienced by the charge ball is W3 . If the displacements in each case are the same, we have

W1<W2<W3
W1>W2>W3
W1=W2=W3
that W1,W2,W3 cannot be related by any equation

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