Networks Analysis and Synthesis - Engineering

Q1:

A copper coil has a resistance of 40 ohm at 20°C. At 100°C the resistance is likely to be

A 44 Ω

B 54 Ω

C 84 Ω

D 104 Ω

ANS:B - 54 Ω

Temperature coefficient of copper = 0.00393 R100 = 40 (1 + 0.00393 x 80)  54 Ω