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A rise of temperature of 4°C is observed in a conductor by passing a current. If the current is tripled, the irse of temperature will be
The heat produced in a conductor is proportional to the square of the current
(H ∝ I²). If the current is tripled, the heat increases by
3² = 9 times. Thus, the temperature rise will be
4°C × 9 = 36°
C. Answer: (d) 36°C.
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