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MHT CET202619 April 2026Evening ShiftPhysicsElectromagnetic InductionActual

A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, then the current in the coil

Options

  1. Awill not change
  2. Bwill increase
  3. Cwill decrease
  4. Dmay increase or decrease depending upon the direction of the current

Correct answer

C. will decrease

Step-by-step solution

When an iron core is inserted into the solenoid, the magnetic permeability of the medium inside the solenoid increases. This leads to an increase in the self-inductance L of the solenoid, which in turn increases the magnetic flux linked with the coil. According to Faraday's law of electromagnetic induction and Lenz's law, an induced emf is generated in the coil that opposes the increase in magnetic flux. This induced emf acts in a direction opposite to the applied battery emf, thereby opposing the flow of the main

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