How many kJ of energy is spent when a current of 4 amp passes for 200 second under a potential of 115 V?
Correct answer: D. 92 kJ
- A. 52 kJ
- B. 72 kJ
- C. 82 kJ
- D. 92 kJ
Explanation
To calculate the energy spent, use the formula for electrical energy: Energy (in joules) = Voltage (V) × Current (I) × Time (t). Here, the voltage is 115 V, the current is 4 A, and the time is 200 s. Therefore, Energy = 115 V × 4 A × 200 s = 92000 J. To convert joules to kilojoules, divide by 1000, resulting in 92 kJ. Thus, Option D is correct. The other options are incorrect because they either underestimate or overestimate the energy due to incorrect calculations.
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