The root-mean-square value of the alternating current is equal to
Correct answer: B. (1/√2 ) times the peak value
- A. twice the peak value
- B. (1/√2 ) times the peak value
- C. half the peak value
- D. equal to the peak value
Explanation
The root-mean-square (rms) value of an alternating current is given by Irms =Ipeak/√2 . This means that the rms value is equal to the peak value divided by the square root of 2
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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