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One capacitor and ammeter connected in series are connected to an ideal battery. Reading of the ammeter is plotted against time. Which graph represents it the best? |
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Answer»
`q= q_(0) (1- e^(-t//tau))` Here `tau` is time constant of the circuit, `tau= RC` On differentiating the charge will respect to time we can calculate current as a function of time `i= (dq)/(dt) = q_(0) (0 + (1)/(tau) e^(-t//tau)) = (q_(0))/(tau) e^(-t//tau)` `rArr i= i_(0) e^(-t//tau)` There is an EXPONENTIAL decay of current and hence option a is correct |
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