The time during which the voltage sources changes its polarity once is called:
Correct answer: A. Time period
- A. Time period
- B. Critical time
- C. frequency of AC
- D. None of the above
Explanation
:The correct option, "Time period," refers to the duration it takes for an AC voltage source to change its polarity once, moving from positive to negative and back to positive (or vice versa).
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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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