Question

28. Derive the expression for joules law of heating, how much heat is produced when a current of 2A flows through a resistance of 100 Ω in 10seconds

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Answer 1

Answer:

Answer

(a) Heat produced ,H=I

2

Rt

(b) Given : R=20ohm,I=5amp,t=30s

We know that H=I

2

Rt

H=5

2

×20×30

H=15000J