The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of.... Question 10825

The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [\(\pi\) = 3.142]

50.0Hz

100.0Hz

311.0Hz

314.2Hz

Correct answer is A

V = 311 sin314.2t compare with,

V = V sin2\(\pi\)Ft

2\(\mu\)F = 314.2

F = \(\frac{314.2}{2 \times\ 3.142}\)

F = 50Hz

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