JEE Main 2018 — Magnetic Effects of Current Question with Solution
JEE Main 2018 (15 Apr Shift 1 Online)
Question
A Helmholtz coil has pair of loops, each with turns and radius . They are placed coaxially at distance and the same current flows through the loops in the same direction. The magnitude of magnetic field at , midway between the centres and , is given by (Refer to figure):
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Point is situated at the mid-point of the line joining the centres of the circular wires which have same radii (R). The magnetic fields at due to the currents in the wires are in same direction.
Magnitude of magnetic field at point,
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This is a previous-year question from JEE Main 2018, covering the Magnetic Effects of Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.