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Friday, 9 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 13 April 2023, Shift 2, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

A straight wire AB of mass 40 g and length 50 cm is suspended by a pair of flexible leads in uniform magnetic field of magnitude 0.400.40 T as shown in the figure. The magnitude of the current required in the wire to remove the tension in the supporting leads is ______ A. (Take g=10 ms−2g=10\ \mathrm{ms^{-2}}).

The figure, in words

Horizontal wire AB hung from a fixed support by two flexible coiled leads at its ends; uniform magnetic field directed into the page (crosses) around the wire.

Official answer

2

NTA final key.

Chapter
Moving Charges and Magnetism
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.