An Uncharged,series RC Circuit Is Connected Across a Battery

question 14

Multiple Choice

An uncharged,series RC circuit is connected across a battery.For which situation will the time for the capacitor to reach 90% of its final charge remain unchanged?​

• A)​The RC time constant is doubled.
• B)​The battery voltage is doubled.
• C)​A second resistor is added in series with the original resistor.
• D)​All of these situations result in the time for the capacitor to reach 90% of its final charge to change.

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