In alternating current the average value of current in cycle is:
Correct answer: A. 0
- A. 0
- B. Constant
- C. +ive
- D. Max
Explanation
In an alternating current (AC) circuit, the flow of electric current periodically changes direction. The current oscillates back and forth, completing one full cycle when it returns to its original direction. The average value of the current over one complete cycle is zero. The average value of the current in an AC circuit over one complete cycle is zero due to the continuous oscillation and symmetrical nature of the alternating current waveform. The average current is given by the formula:Iavg= 1/T∫0Ti(t)dtIavg is the average current,T is the total time period,i(t) is the instantaneous current at time tThe integral represents the area under the current vs. time curve over one complete cycle.
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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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