220V, 50 Hz AC supply is connected across a resistor of 50 k ohms. The current at time t Seconds, assuming that it is zero at t = O, is?
Correct answer: C. 6.2 sin(314t) mA
- A. 4.4 sin(314t) Ma
- B. 4.4 sin(l 57t) mA
- C. 6.2 sin(314t) mA
- D. 6.2 sin(l 57t) mA
Explanation
Following is the explanation to this question:
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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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