A. 60V
B. 150V
C. 225V
D. 360V
Correct Answer:
Option A – 60V
Explanation
P = 40W
R = 90W
V = ?
P = \(\frac{V^2}{R}\)
V\(^2\) = PR = 40 x 90
V\(^2\) = 3000
V = √3600
V = 60N
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