A 4.7 MΩ resistor is in series with a 0.015 µF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
A. 35 ms
B. 352 ms
C. 3.5 ms
D. 70.5 ms
Answer: Option B
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Capacitor store electrical energy in electric field
And inductor stores energy in magnetic field
T=RC
=70.5 millisecond
1T=63.3%
5T=100%
SO time taken to full charge=5×70.5
=352milli second
Explanation...