Alternating Current Ques 28
28. The time constant of $C-R$ circuit is
(a) $1 / CR$
(b) $C / R$
(c) $CR$
(d) $R / C$
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Answer:
Correct Answer: 28.(c)
Solution:
- (c) The time constant for resonance circuit, $=CR$
Growth of charge in a circuit containing capacitance and resistance is given by the formula,
$q=q_0(1-e^{-t / C R})$
$CR$ is known as time constant in this formula.
BETA
