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Question

$$100$$ J of heat is produced each second in a $$4 \Omega $$ resistor. Find the potential difference across the resistor.


Solution

Given,

$$R=4\Omega,Heat=100j$$

We know that,

 $$Heat=\dfrac{v^2 t}{R}\Rightarrow 100=\dfrac{V^2\times 1}{4}\Rightarrow V^2=400\Rightarrow V=20v$$

Physics

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