A single mains conductor carries a current of amplitude
PHYSICS · Multi-part · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Electronics, Instrumentation & Communication · Sensors, detectors and experimental instrumentation
Inside the Instrument, Ch Transmission lines, grounding and the bench
Problem
A single mains conductor carries a 50Hz current of amplitude 5.0A, with its return conductor run far away, and passes 5.0cm from a type-K thermocouple lead pair whose two conductors enclose a loop of area 4.0cm2. The loop's plane contains the mains conductor. Treat the mains conductor as long and straight and its field as uniform over the loop.
((a)) Find the amplitude of the magnetic field at the loop.
((b)) Estimate the amplitude of the voltage induced in the loop.
((c)) Express that voltage as a temperature-equivalent amplitude, taking the thermocouple's sensitivity as 41μVK−1.