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physics objective Questions and Answers with explanation and solutions

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Physics - Electrostatics Questions and Answer >>

1 2 3  Page 1 of 3 pages (14 Objective Questions)

1. A charged oil drop is to be held stationary between two plates separated by a distance of 25mm . If the mass of the drop is 5 x 10-15 kg and the charge on it is l0-18   C the potential to be applied between the two plates is (g = 10 ms-2)

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2. A sphere of radius 1 em has potential of 8000 V, then energy density near its surface will be

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3. Two metal spheres of radii R1 and R2 are charged to the same potential. The ratio of charges on the spheres

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4. A radioactive source in the form of a metal sphere of radius 10-2 m, emits beta particles at the rate of 5 x 1010 partiCles per sec. The source is electrically insulated. How long will it take for it's potential to be raised by 2 volts, assuming 40% of the emitted beta particles escape the source

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5. A simple pendulum has a metal bob, which is negatively charged. If it is allowed to oscillate above. a positively charged metallic piate, then its time period will

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