An 80 muC charge is given to the 4muF capacitor in the circuit shown in Fig. so the upper plate A is positively charged. An unknown resistance R is connected in the left limb. As soon as the switch S in the central limb is closed, a current of 2 A flows through the 2Omega resistor in the central limb. The capacitive time constant for the circuit is

An 80 muC charge is given to the 4muF capacitor in the circuit shown i

1.	An 80 muC charge is given to the 4muF capacitor in the circuit shown in Fig. so the upper plate A is positively charged. An unknown resistance R is connected in the left limb. As soon as the switch S in the central limb is closed, a current of 2 A flows through the 2Omega resistor in the central limb. The capacitive time constant for the circuit is
Answer» `56 mus ` `8 mu s` `200 mu s` `40 mus ` SOLUTION :d. Potential difference across the central limb = 16 V = Potential difference across `16 Omega` = potential across the LEFT limb. CURRENT through `16Omega` = 1A Current through the left limb = 1 A and R = `11 Omega` `:. tau_(C) = (16/2+2) Omega xx (4 xx 10^(-6)) F = 40 mus` .

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