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
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