An alternating current having peak value $$14$$ A is used to heat a metal wire. To produce the same heating effect, a constant current $$i$$ can be used, where $$i$$ is:
1. $$14$$ A
2. about $$20$$ A
3. $$7$$ A
4. about $$10$$ A

Subtopic: Â Power factor |
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An AC source rated $$100~\text{V}$$ (rms) supplies a current of $$10~\text{A}$$ (rms) to a circuit. The average power delivered by the source:

 (a) must be $$1000~\text{W}$$. (b) may be $$1000~\text{W}$$. (c) may be greater than $$1000~\text{W}$$. (d) may be less than $$1000~\text{W}$$.
Choose the correct option:
 1 (a) only 2 (b), (c) 3 (b), (d) 4 (a), (d)

Subtopic: Â Power factor |
Â 61%
From NCERT
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Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch