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

Subtopic:  Power factor |
 66%
From NCERT
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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:  Power factor |
 64%
From NCERT
To view explanation, please take trial in the course.
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Hints
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