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A parallel combination of 0.1 M Omega resistor and a 10 muF capacitor is connected across a 1.5V source of negligible resistance. The time required for the capacitor to get charged up to 0.75 V is approximately (in seconds). |
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Answer» `oo` 0.75 V, the charge on the plates should be as follow.  `q=CE[1-e^(-t//RC)]` or `0.75 xx 10^(-5) = 10^(-5) xx 1.5 [1-e^(-t/(10^5 xx 10^(-5)))]` or `1/2 = [1-e^(-t)] or e^(-t) = 1/2` TAKING LOG on both SIDES, we get `-t = -1n2 or t =0.693s`. |
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