Correct Answer: Option C

Explanation

\(\frac{MA}{VR}\times\frac{100}{1}=efficiency\)

\(\frac{L}{E}\frac{1}{VR}\times\frac{100}{1}=75\)

\(\frac{1000}{E}\frac{1}{4}\times\frac{100}{1}=75\)

\(E = \frac{250 \times 100}{75}\)

E = 333.3N

There is an explanation video available below.

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