When the current is being drawn from the battery
Correct answer: D. Both (a) and (c)
- A. V = E + Ir is applied
- B. V = E - Ir is applied
- C. It is being discharged
- D. Both (a) and (c)
Explanation
When the current is being drawn from the battery, the voltage across the battery terminals (V) is given by:a) V = E + IrThis equation represents the voltage (V) as the sum of the battery's electromotive force (E) and the voltage drop (Ir) due to the internal resistance (r) of the battery when current (I) is drawn from it.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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