A steady current of 5 A is drawn from an electric source at a voltage of 100 V. The power consumed (in Watts) is:
Correct answer: C. 500
- A. 0.05
- B. 5
- C. 500
- D. 50000
Explanation
Option A: This is the power consumed if the current is 0.05 A. However, the current is given as 5 A, so this option is incorrect. Option B: This is the power consumed if the current is 5 A and the voltage is 1 V. However, the voltage is given as 100 V, so this option is also incorrect. Option C: The power consumed is 500 Watts.Power is defined as the rate at which energy is consumed. It is calculated by multiplying the voltage by the current. In this case, the voltage is 100 V and the current is 5 A, so the power is:Power = Voltage * Current = 100 V * 5 A = 500 WattsThe answer is 500. Option D: This is the power consumed if the current is 5 A and the voltage is 1000 V. However, the voltage is given as 100 V, so this option is also incorrect.
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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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