Statement I Alternating current cannot be measured by DC am…

Physics JEE Main Full Syllabus Mock Test 75 Question New Syllabus TEST 4 PCM MCQ (Single Correct)

Statement I Alternating current cannot be measured by DC ammeter because alternating current changes direction continuously.

Statement II If wattless current flows in the AC circuit, then the circuit is series circuit. In the light of the above statements, choose the correct answer from the options given below

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I is true but Statement II is false.

Statement I is false but Statement II is true.

Text Solution

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The correct answer is:

In AC current, average value of current in complete cycle is zero and DC ammeter measure only the average value of current. Therefore, statement is correct. Wattless current flows in a circuit only when circuit is purely capacitive or inductive. Therefore, statement II is incorrect.

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