Engineering Board Exam Reviewer · Time Response of Reactive Circuits · medium
A 100, F capacitor charged to 100 V discharges through a 10 k resistor. How long does it take for the voltage to fall to 10 V?
- 2.3 s
- 1 s
- 0.1 s
- 5 s
Answer
A. 2.3 s
Solution
=RC=(10,000)(100×10-6)=1 s. 10=100e-t/ t= 10=2.3 s.
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