Questions

A capacitor is charged using an external battery with a resistance x in series. The dashed line shows the variation of ln I with respect to time t. lf the resistance is changed to 2x, the new graph will be

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detailed solution

Correct option is B

I=εR e−t/RClogeI=loge εR − tRC logee ⇒ ln I = ln εR−tRCSlope =−tRC; y intercept=lnεrIf resistance is made doubled, both slope and y intercept decrease in magnitude.

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