An uncharged series RC circuit is to be connected across a battery.For each of the following changes, determine whetherthe time for the capacitor to reach 90% of its final chargewould increase, decrease, or remain unchanged. Indicateyour answers with “I,” “D,” or “U,” respectively. (a) The RCtime constant τ is doubled. (b) The battery voltage is doubled.(c) A second resistor is added in series with the original resistor.
Ohm's law
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Path of Least Resistance
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An uncharged series RC circuit is to be connected across a battery.
For each of the following changes, determine whether
the time for the capacitor to reach 90% of its final charge
would increase, decrease, or remain unchanged. Indicate
your answers with “I,” “D,” or “U,” respectively. (a) The RC
time constant τ is doubled. (b) The battery voltage is doubled.
(c) A second resistor is added in series with the original resistor.
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