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Solution


Q.

Let us consider the flow of the current through a metallic wire. If the temperature of the entire system increases, what will happen from the following options
1 Potential difference (V) increases  
2 Resistance (R) decreases  
3 Potential difference (V) decreases  
4 V and R remain the same  

Ans.

(3)

If the temperature of the entire system increases when the current is flowing through a metallic wire, the power (VI) is dissipated in the form of heat. Hence, the potential difference (V) decreases.