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Friday, 9 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 13 April 2023, Shift 2, Physics Q58

Question 58 of 90 in this shift, Physics question 28 of 30, Section B.

An insulated copper wire of 100 turns is wrapped around a wooden cylindrical core of the cross-sectional area 24 cm224\ \mathrm{cm^2}. The two ends of the wire are connected to a resistor. The total resistance in the circuit is 12 Ω12\ \Omega. If an externally applied uniform magnetic field in the core along its axis changes from 1.51.5 T in one direction to 1.51.5 T in the opposite direction, the charge flowing a point in the circuit during the change of magnetic field will be ______ mC.

Official answer

60

NTA final key.

Chapter
Electromagnetic Induction
Topic
Faraday's Law
Idea tested
Induced Charge Flow

Same idea in other shifts

Asked 3× in all
  1. 3 Aug 2021, Shift 2 · Q14Two concentric and coplanar circular coils have radius aa and b (≫a)b\ (\gg a) as shown in figure. Resistance of the inner coil is RR.…MediumSingle correctHas a figure
  2. 2 Apr 2017 (offline) · Q20In a coil of resistance 100 Ω100\ \Omega, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude…MediumSingle correctHas a figure

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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.