NCERT - Science

Book: NCERT - Science

Chapter: 12. Electricity

Subject: Physics - Class 10th

Q. No. 3 of In Text Questions-Pg-218

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An electric iron of resistance20 takes a current of 5 A. Calculate the heat developed in 30 s.

Here, Current, I = 5 A

Resistance, R = 20

Time, t = 30 s

Now, we know, Heat produced is given as,

Thus, the heat developed is 15000 joules.


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