IIT JEE 2007 Practice : PHYSICS - Subjective Problems

This section contains 4 numerical problems. The answer to each of the questions would lie between 0 and 9999. You have to simply write the correct numerical value in the input box provided. You will be awarded 6 marks for correct numerical value and 0 for an incorrect value.

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A capacitor (C = 4 µF) is connected in series with a resistor (R = 2.5 MΩ) across a battery of negligible internal resistance and voltage V = 12 V. What is the time (in second) after which the potential difference across the capacitor becomes eight times that across the resistor? Take ln 3 = 1.1 .

 

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