When the r m s value of a source of electricity... - JAMB Physics 2017 Question
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 option: b
The relationship between the peak value and r.m.s value of electricity supply is given as
V\(_{r.m.s}\) = \(\frac{V_o}{\sqrt{2}}\)
where Vo = peak voltage
∴ Vo = V\(_{r.m.s}\) × √2
= 240 × √2
= 339.5v
= 340v
V\(_{r.m.s}\) = \(\frac{V_o}{\sqrt{2}}\)
where Vo = peak voltage
∴ Vo = V\(_{r.m.s}\) × √2
= 240 × √2
= 339.5v
= 340v
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