Question

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

Answer 1

Answer:

Explanation:

Resistance of the iron = 20 ohm          

Current = 5 ampere          

Time = 30 seconds  

To Find :-

Heat Produced.

Formula to be used :-

Heat produced = I²RT    

Solution :-

Putting all the values, we get    

Heat produced = I²RT          

Heat produced = 25 × 20 × 30          

Heat produced = 15000 Joules.

Hence, the heat produced in 30 seconds is 15000 Joules.

Extra Information :-

One Volt Potential Difference - The potential difference between two points in an electric field is the amount of work done in bringing a unit positive charge from one point to another.

Potential Difference = Work done/Charge = W/Q

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Answer 2

I hope that you are comfortable with this answer