Question

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

• will not change.

• will increase.

• will decrease.

• may increase or decrease depending upon the direction of the current.

Answer 1

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 will increase.

Explanation:

Inserting an iron core increases the magnetic field strength of the solenoid, but it does not change the resistance of the circuit. Since current I = `V/R` depends only on voltage and resistance (for steady DC), the current remains unchanged.