University Physics II · DC and transient circuits
Time to reach ninety percent charge
Problem
An initially uncharged capacitor with $R=50.0\,\mathrm{k\Omega}$ and $C=40.0\,\mu\mathrm F$ charges from an ideal constant-voltage source. How long does it take to reach $90.0\%$ of its final voltage?
Hint
Compute the time constant.
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