Which of the following statements is true?
Correct answer: D. Power is proportional to both voltage and the current
- A. Power is proportional to voltage only
- B. Power is proportional to current only
- C. Power is neither proportional to voltage nor to the current
- D. Power is proportional to both voltage and the current
Explanation
The correct answer is that power is proportional to both voltage and the current. This is derived from the equation P = IV, where P represents power, I is the current, and V is the voltage. This means that any change in voltage or current will directly impact the power. The other options are incorrect because they fail to consider the dual dependence of power on both voltage and current as expressed in the formula.
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About Current Electricity
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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