In an automated test rig

PHYSICS · Single correct · CBSE · Physics · Alternating Current · Alternating Current

Problem

In an automated test rig, a capacitor is first charged through resistor

R_{\text{c}}

for

4.0\,\text{ms}

until it reaches 70% of its final charge. Immediately afterward, it is disconnected from the source and allowed to discharge through a different resistor

R_{\text{d}}

for

6.0\,\text{ms}

, at which point its charge has fallen to 30% of the amount present just after charging. What is the ratio

R_{\text{d}}/R_{\text{c}}

? (a)

1.0

(b)

0.67

(c)

1.5

(d)

0.44

Related theory

Time-Dependent Circuits
Electric Circuits
AC circuits with R, L, C
AC applied to a capacitor
Alternating Current

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