Physics

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

0.67

1.5

0.44

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