Question

The- figure shows an experimental plot discharging of a capacitor in an R-C circuit. The time constant r of this circuit lies between

(a) 150s and 200s (b) 0 and 50s (c) 50s and 100s (d) 100s and 150s

Answer 1

Correct Option(d) 100s and 150s

Explanation

Time constant t is the duration when the value of potential drops by 63% of its initial maximum value ( i.e., V_o/e). Here, 37% of 25 V= 9.25 V which lies between 100 s to 150 s in the graph.