Navigate

If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.

If an A.C. mains supply is given to be 220 V, what would be the average e.m.f. during a positive half cycle?

Options

(a) 256 V
(b) 512 V
(c) 386 V
(d) 198 V

Correct Answer:

198 V

Explanation:

Vₐᵥ = 2V₀ / π = (2 / π) [V(rms) × √2] = (2√2 / π) × V(rms)

Vₐᵥ = (2√2 / π) × 220 = 198 V

MH2002
admin:

Related Questions

  1. A small part of the rim of a fly wheel breaks off while it is rotating at a constant
  2. A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
  3. A particle moving in a straight line with uniform acceleration is observed
  4. The equiconvex lens has focal length f. If it is cut perpendicular to the principal
  5. Electron in hydrogen atom first jumps from third excited state to second excited