an alternating current having peak value 14A is used to heat a metal wire to produce the same heating effect a constant current I can be used where I is ?
Answer (1)
3rd Jul, 2020
The following question is from Electromagnetic Induction. Such questions boost your confidence and also help you explore for various types of questions asked in competitive entrance examinations like NEET, JEE, etc. The following chapter has lots of formulas so first clear the concepts and then byheart all the formulas it will be enough I guess to solve the mcqs asked from this chapter.
The root mean square velocity value an AC current is equal to the dc current that gives away the same average power to a resistor as the periodic current. So, the constant current i that produces the same heating effect as AC current of peak value 14A, in a metal wire is :
I (rms) =I (peak) / root of 2
= 14 / root of 2
= 9.899A
Thank you.
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