Question 15.4: How much resistance should be connected in series with a 100......
How much resistance should be connected in series with a 100-pF capacitor to give it a total charge time of 0.2 s?
Step-by-Step
Change the above formula to solve for resistance.
R=\frac{\tau}{C}
The total charge time is to be 0.2 s. The value of τ is therefore 0.2/5 = 0.04 s. Substitute these values in the formula.
R=\frac{0.04}{100~ \times ~10^{-12}}
R = 400 MΩ
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