PHYSICS · Multi-part · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A magnetic-field probe placed 10.0cm away from a long, straight wire registers a field magnitude of 20μT.
(a) Determine the current carried by the wire. Show all algebraic steps and express your answer with an appropriate number of significant figures.
(b) Convert the measured field strength of 20μT to gauss. (Recall that 1T=104G.)
(c) Without repeating the full calculation, predict the magnetic-field magnitude that the same probe would record if it were moved to a distance of 25.0cm from the wire. Explain your reasoning clearly.