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GUJCET 2014 Physics Solved Paper

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Question : 3

Total: 40

Two spheres having same radius and mass are suspended by two strings of equal length from the same point, in such a way that their surfaces touch each other. On depositing charge 4×10−6C on them they repel cach other in such a way that in equillibrium the angle between their strings becomes 60∘. If the distance from the point of suspension to the center of the sphere is 10‌cm. Find the mass of each sphere. (K=9×109‌SI. and g=10ms−2.)

0.3117‌kg
0.6235‌kg
0.1559‌kg
1.2468‌kg

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