JEE Main202127 Jul 2021Evening ShiftPhysicsCurrent ElectricityActual
The resistance of a conductor at 15 ° C is 16 Ω and at 100 ° C is 20 Ω . What will be the temperature coefficient of resistance of the conductor?
Options
- A0 . 010 ° C - 1
- B0 . 033 ° C - 1
- C0 . 003 ° C - 1
- D0 . 042 ° C - 1
Correct answer
C. 0 . 003 ° C - 1
Step-by-step solution
16 = R 0 1 + α 15 - T o 20 = R 0 1 + α 100 - T 0 Assuming T o = 0 ° C , as a general convention. ⇒ 16 20 = 1 + α × 15 1 + α × 100 ⇒ α = 0 . 003 C ∘ - 1