engineering physics MCQ #932

engineering physics MCQ #932

1. Question 1

   Q1. The resistance of a conductor is 5 ohm at 0°C and 7 ohm at 100°C. Its temperature coefficient is

   • A) 0.004 /°C
   • B) 0.002 /°C
   • C) 0.006 /°C
   • D) 0.008 /°C

   Answer: 0.004 /°C

   Explanation: Using R = R0 (1 + αT), where R0 = 5, R = 7, T = 100, we get 7 = 5 (1 + α * 100), hence α = (7 / 5 - 1) / 100 = 0.004 /°C