The temperature at which resistance of conductors becomes double to its resistance at 0°C is

The temperature at which resistance of conductors becomes double to its resistance at 0°C is:

  1. 1/α0 °C
  2. 3/α0 °C
  3. 1/(1+ α0) °C
  4. α0 °C

Correct answer: 1. 1/α0 °C

Explanation

Rt= R0 (1+ α0 t)

Here it is known that

Rt= 2.R0

2R0= R0 (1+ α0 t)

Or t = 1/α0°C

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