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Question
Two identical metallic sphere are charged with 10 and -20 units of charge. If both the spheres are first bought into contact with each other and then are placed to their previous positions,Then the ratio of the forces in the two situations will be:
Two identical metallic sphere are charged with 10 and -20 units of charge. If both the spheres are first bought into contact with each other and then are placed to their previous positions,Then the ratio of the forces in the two situations will be:
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Solution
The correct option is B 8:1
By charge covenstion 10−20−q+q
2q=−10
q=−5
F′=k(−5)(−5)r2
FF′=K(10)(20)r2×r2k(25)
=8
By charge covenstion 10−20−q+q
2q=−10
q=−5
F′=k(−5)(−5)r2
FF′=K(10)(20)r2×r2k(25)
=8
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