Question

A condenser of capacity $1\mu F$ and a resistance $0.5$mega ohm are connected in series with a D.C. supply of $2$V. The time constant of the circuit is?

• A. $0.25$sec
• B. $0.5$sec
• C. $1$sec
• D. $2$sec

Answer 1

The correct option is B $0.5$sec

Time constant of the circuit $\tau =RC$
$\tau =\left({10}^{-6}F\right)(0.5\times {10}^6\Omega )=0.5$sec.