A student is studying the magnetic field produced by a long
PHYSICS · Multi-part · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A student is studying the magnetic field produced by a long, straight current-carrying conductor placed vertically on the table.
(i) State the rule that helps to determine the direction of the magnetic field around the conductor.
(ii) Identify any two factors on which the magnitude of the magnetic field at a fixed point near the conductor depends.
(iii) Explain qualitatively how the magnitude of the magnetic field will change if the distance of the point from the conductor is doubled while the current remains unchanged.
(iv) Write the standard expression for the magnetic field produced by such a conductor and explain the physical meaning of each symbol used in the expression.