Question

# A 8.5 V battery supplies a 2.0 mA current to a circuit for 2.9 hr ....

A 8.5 V battery supplies a 2.0 mA current to a circuit for 2.9 hr . Part A) How much charge has been transferred from the negative to the positive terminal? Part B) How much work has been done on the charges that passed through the battery?

DATA

Part A) - Solution

The electric current is given by the formula

or

Part B) - Solution

The work done on the charges that passed through the battery can be expressed as

where P is the average power

thus,

or

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