If Io is the peak value of current, then its root mean square value is given by:
Correct answer: A. √2 Io
- A. √2 Io
- B. 2 Io
- C. Io
- D. 0.7 Io
Explanation
This means that the root mean square (RMS) value of a current with a peak value of Io is obtained by multiplying the peak value by the square root of 2.
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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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