The voltage of the domestic electric supply is represented by the equation V = 311...

JAMB 1997

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]

A. 50.0Hz
B. 100.0Hz
C. 311.0Hz
D. 314.2Hz

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Correct Answer: Option A

Explanation

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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The voltage of the domestic electric supply is represented by the equation V = 311...

Correct Answer: Option A

Explanation

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