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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. An electron enters between two horizontal plates separated by 2 mm and having a p.d. of 1000 V. The force on electron is. [JIPMER 1999]


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2. Electric charges of + 10μ, +5μC, - 3μC and + 8μC are placed at the corners of a square of side √2 m. The potential at the centre of the square is


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


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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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