Question

An electric iron of resistance 20 Ohm takes a current of 5 ampere. Calculate heat developed in 30 seconds

Answer 1

Here is your answer!!!

Answer 2

Hello friend

Good evening

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Given that,

=> resistance of electric iron = 20 ohm

=> current = 5 A

=> time = 30 seconds

Find, heat =?

We know that

Heat = I^2 R t

Heat = ( 5 )^2 × 20 × 30

Heat = 25 × 600

Heat = 15000 J or 15 kJ

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So the heat developed in 30 seconds = 15 kJ

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@drsm