If the frequency of an A.C generator is increased by a factor of 2, then the frequency of the instantaneous power is increased by.
Correct answer: A. 2 times
- A. 2 times
- B. 3 times
- C. 4 times
- D. None
Explanation
The frequency of the instantaneous power in an AC circuit is always double the frequency of the voltage and current. If the generator's frequency is doubled, the power frequency will also be doubled from its previous value.
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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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