JEE Main 2026 — Magnetic Effects of Current Question with Solution
JEE Main 2026 (28 January Shift 1)
Question
Three long straight wires carrying current are arranged mutually parallel as shown in the figure. The force experienced by 15 cm length of wire is .
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Choose an option
Show full solutionCorrect option: D
Correct answer
D towards
Step-by-step explanation
The force per unit length between parallel wires is .
Force on Q from P (opposite currents, repulsive towards R): N/m.
Force on Q from R (same currents, attractive towards R): N/m.
Total force per unit length towards R: N/m.
For 0.15 m length: N towards R.
Force on Q from P (opposite currents, repulsive towards R): N/m.
Force on Q from R (same currents, attractive towards R): N/m.
Total force per unit length towards R: N/m.
For 0.15 m length: N towards R.
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This is a previous-year question from JEE Main 2026, 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.