If it takes 400 ms to use 12,000 J of energy, the power is
A. 30 kW
B. 30 W
C. 3 W
D. 300 kW
Answer: Option A
Solution(By Examveda Team)
To calculate power (P), you can use the formula:P = Energy (E) / Time (t)
In this case, the energy is
12,000 J
, and the time is 400 ms
, which needs to be converted to seconds:400 ms = 0.4 seconds
Now, you can calculate the power:
P = 12,000 J / 0.4 s = 30,000 W = 30 kW
So, the correct answer is Option A: 30 kW, as the power is 30,000 watts or 30 kilowatts, which represents the rate at which energy is used or transferred.
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