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  • An electric iron of resistance 20 omega takes a current of 5 A. Calculate the heat developed in 30 s.

   An electric iron of resistance 20 \; \Omega  takes a current of 5 A. Calculate the heat developed in 30 s.

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Given :  resistance=R= 20 \; \Omega, TIME =30s    , current =I=5A

              V=IR

          \Rightarrow V=5\times 20=100V

   H=VIt

\Rightarrow H=100\times 5\times 30

\Rightarrow H=15000J=1.5\times 10^4J

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seema garhwal

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