Q.

A magnet oscillating in a  horizontal plane has a time period of 2 sec at a place where the angle of dip is 30o and 3 second at another place where the angle of dip is 60o. The ratio of resultant magnetic fields at these two places is

Moderate

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By Expert Faculty of Sri Chaitanya

a

93

b

493

c

943

d

437

answer is 3.

(Detailed Solution Below)

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Detailed Solution

BH1=B1cos30oBH2=B2cos60oT∝1BHT1T2=BH2BH1=B2Cos60oB1cos30o23=B2B11349=B2B113B1B2=943
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