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The r.m.s value of a supply voltage is quoted at 200v. What is the approximate...

Physics
JAMB 2015

The r.m.s value of a supply voltage is quoted at 200v. What is the approximate peak value of the voltage?
  • A. 200volts
  • B. 300volts
  • C. 283volts
  • D. 250volts
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Correct Answer: Option C
Explanation
Vr.m.s = V0 ÷ V2, where Vr.m.s rep. to as voltage root –square mean, v = peak voltage

Vr.m.s = 200volt, v = ?

200 = V0 ÷ V2

V0 = 200v2

= 200 × 1.414

= 282.8 volts V0 = b &approx.; 283 volts

There is an explanation video available below.


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Explanation Video

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