Question

The current through an electrical conductor is 1A when the temperature of the conductor 0°C and 0.7 A when the temperature is 100°C. The current when the temperature of the conductor is 1200°C is ___________ (a) 0.08 A (b) 0.16 A (c) 0.32 A (d) 0.64 A This question was addressed to me during an interview for a job. This question is from Problems Involving Dot Conventions in division Resonance & Magnetically Coupled Circuit of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

Right choice is (b) 0.16 A To elaborate: \frac{1}{0.7} = \frac{R_O (1+αt)}{R_O} = 1 + α100 ∴α = 0.0043 per °C Current at 1200 °C is given by, \frac{1}{I} = \frac{R_O (1+α1200)}{R_O} = 1 + α1200 = 1 + 0.0043 × 1200 = 6.16 ∴ I = \frac{1}{6.16} = 0.16 A.