A cell C of negligible resistance and a switch are in series with a resistor R. The switch is moved to the on (closed) position for a time t.
Which change reduces the amount of charge flowing through R in time t?
1 )
Add an identical cell in parallel with C.
2 )
Add an identical cell in series with C.
Add a second resistor in series with R.
4 )
Add a second resistor in parallel with R.
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