1.

If the resistance 5ohm develops a heat of 42J per second heat develops in 2ohm resistance must be about

Answer»

Answer:

16.8 joule/sec

Explanation:

GIVEN:-

P1 = 42J per second

P=I²R

P1 = I²R1

P2 I²R2

42 = 5 (I² and I² gets CANCELLED)

P2 2

P2 = 42×2/5

P2 = 84/5

P2 = 16.8 J/sec

it is power don't CONSIDER it heat energy because it's unit is joule per second which is of power = work/time = joule per second.



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