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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #27735)