Home
Class 12
PHYSICS
A solenoid is connected to a battery so ...

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

Text Solution

Verified by Experts

The current will decrease. This is because on inserting an iron in the solenoid, magnetic field and hence magnetic flux linked with the solenoid increase. As per Lenz's law, the emf induced in the solenoid will oppose this increase, which can be achieved by a decrease in current.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Solved Examples (b)|1 Videos

  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Short Answer Qusetions|2 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Exercise|191 Videos

  • ELECTROMAGNETIC WAVES

    PRADEEP|Exercise II Focus multiple choice question|5 Videos

Similar Questions

Explore conceptually related problems

A solenoid is connedted to a source of constant EMF for a long time. A sof iron piece is inserted into it. Then :

Statement I: An eletric lamp is connected in series with a long solenoid of copper with air core and then connected to an ac source. If an iron rod is inserted in the solenoid, the lamp will become dim. Satement II: If an iron rod is inserted in the solenoid, the inductance of the solenoid increases.

A tightly-wound, long solenoid having 50 turns cm^(-1) , carris a current of 4.00 A . Find the magnetic intensity H and the magnetic field B at the centre of the solenoid. What will be the values of these quantities if an iron core is inserted in the solenoid and the magnetization I in the core is 4.00 xx 10^6 A m^(-1) ?

A coil and a bulb are connected in series with a 12 volt direct current source. A soft iron core is now inserted in the coil. Then

Assertion: A bulb connected in series with a solenoid is connected to AC source. If a soft iron core is introduced in the solenoid, the bulb will glow brighter. Reason: On introducing soft iron core in the solenoid, the inductance increases.

A long solenoid connected to a 12V DC source passes a steady current of 2 A. When the solenoid is connected to an AC source of 12V at 50 Hz, the current flowing is 1A. Calculate inductance of the solenoid.

Find the current flowing through the battery in steady state?

There is one tightly wound long solenoid carrying current 2 A. Solenoid have 100 turns per cm. H_1 is the magnetic intensity and B_1 is the magnetic field at the centre of solenoid. Now an iron core is inserted inside the solenoid. Intensity of magnetization in the core is 4 xx 10^6 A/m. New values of magnetic intensity and magnetic field at the centre becomes H_2 and B_2 Value of H_2//H_1 is