Alternating current is produced by a voltage source which polarity:
Correct answer: A. Keeps on reversing with time
- A. Keeps on reversing with time
- B. Remains the same
- C. Reverses after period
- D. None of these
Explanation
The correct option is that in alternating current (AC), the voltage source polarity keeps on reversing with time, leading to a continuous change in the direction of current flow.
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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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