Alternating current can be measured by D.C ammeter because if:
Correct answer: B. Average current for complete cycle is zero
- A. A.C is virtual
- B. Average current for complete cycle is zero
- C. A.C cannot pass through D.C ammeter
- D. None of the above
Explanation
In an AC circuit, the current changes direction periodically, resulting in positive and negative values that cancel each other out over a complete cycle. This leads to an average current of zero over one full cycle, making it challenging to measure AC using a DC ammeter, which registers the average current.
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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.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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