# Alternating quantities

### Explanation of question 3

The value of a sinusoidal current is adjusted to produce the same heating effect as a certain direct current. This alternating current will have a value of

1. 0.637 of the direct current
2. 0.707 of the direct current
3. equal to the direct current
4. 1.414 times that of the direct current peak value .

The answer is :- 3 The equivalent dc current with the same heating effect is the definition of the value of the rms current

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