Loading [MathJax]/jax/output/HTML-CSS/jax.js
Home / Aptitude Tests / Physics / When the r.m.s value...

When the r.m.s value of a source of electricity supply is...

When the r.m.s value of a source of electricity supply is given as 240v, it means that the peak value of the supply is

A.

240v

B.

340v

C.

480v

D.

57600v

Correct answer is B

The relationship between the peak value and r.m.s value of electricity supply is given as

Vr.m.s = Vo2

where Vo = peak voltage

∴ Vo = Vr.m.s × √2

= 240 × √2

= 339.5v

= 340v