Solved Numerical Problem No.1 ( Unit-15: Alternating Current); HSSC-II (Class-12); Physics (New Book/KPK Text Board, Peshawar) With Verified Answers

The peak voltage of an ac supply is 300 V. What is the RMS voltage? Ans (212.1V) 

Data Given:

Maximum Voltage = `\V_{max}` = 300 V

To Find:

Root Mean Square (RMS) voltage = `\V_{rms}` = ?

Solution:

Since,

`\V_{rms}` = `\frac {V_{max}}{sqrt 2}`

putting values

`\V_{rms}` = `\frac {300 V}{sqrt 2}`

`\V_{rms}` = `\frac {300 V}{1.414}`

`\V_{rms}` = 212.132 V ------------------------Ans.

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