A resistor has initial resistance 'R 0 ' at 0 º C.

Question

A resistor has initial resistance 'R0' at 0ºC. Now, it is connected to an ideal battery of constant emf = 'v'. If the temperature co–efficient of resistance is α, then after how much time, will its temperature be 'TºC' (mass ofthe wire = m, specific heat capacity of the wire = S). Assume the resistance varies linearly with temperature neglect heat loss to the surrounding.

Shobhit Varshney · Accepted Answer

Dear student,Resistance here is time dependent, so heat energy per unit time (power) will also be a function of time. So, we need to consider dt time interval, which will increase the temperature by dT. Use integration to find out the time required for T temp increase.Thanks.

Electric Current> A resistor has initial resistance 'R 0 ' ...

AKSHAY CHAUHAN , 10 Years ago

Shobhit Varshney

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Electric Current> A resistor has initial resistance 'R 0 ' ...

AKSHAY CHAUHAN , 10 Years ago

Shobhit Varshney

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Ask a Doubt

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