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The time constant of and R- C cirucit during charging is them time in which the charge on the condenser plates, as compared to maximum charge (q_0) becomes (q//q_0)xx 100, which is equal to …….. .

Answer»

SOLUTION :`Q = q_(0)(1 - e^(-t/tau))`. PUTTING`t = tau,` we get
`(q)/(q_(0)) = 1-e^(-1)`
or `(q)/(q_(0))xx100 = (e-1)/(e ) xx100 = 63.2%`


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