Here, it is given H = 100J, t = 1sec, R = 4ohms,We know that according to Joule's law of heatingH = I2RT100 = I2×4×1100/4 = I2I = 5ampAgain we know thatV = IRV = 5X4= 20V

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Lakhmir Singh & Manjit Kaur - Physics

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Q. 114.3( 20 Votes )

100 joules of hea

Class 10th Lakhmir Singh & Manjit Kaur - Physics 1. Electricity

Answer :

Here, it is given H = 100J, t = 1sec, R = 4ohms,

We know that according to Joule's law of heating

H = I²RT

100 = I²×4×1

100/4 = I²

I = 5amp

Again we know that

V = IR

V = 5X4

= 20V

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