Home
Class 12
PHYSICS
A current of 2 A flows in an air core so...

A current of 2 A flows in an air core solenoid of length 1 m and number of turns 1000. What is the magnetic flux density inside the solenoid?

Text Solution

Verified by Experts

The correct Answer is:
1
Magnetic field inside the solenoid is `mu_0 nI` and hence magnetizing field vector is nl. To demagnetize the bar magnet, magnetic intensity inside the solenoid should be equal to coercivity of material of magnet.
`nI = 100`
`100 xx I =100`
`rArr I = 1A
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise COMPETITIONFILE (EXEMPLAR PROBLEM OBJECTIVE QUESTION (MULTIPLE CHOICE QUESTION (TYPE-I))|20 Videos

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST FOR BOARD EXAMINATION|16 Videos

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise COMPETITION FILE (ASSERTION REASON TYPE QUESTION)|10 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    MODERN PUBLICATION|Exercise Chapter Practice Test|9 Videos

  • MOVING CHARGES AND MAGNETISM

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|13 Videos

Similar Questions

Explore conceptually related problems

A solenoid made up of copper wire consists of 400 turns and carries a current of 5 A. If length of the solenoid is 0.5 m and has a radius of 2 cm, find the magnitude of the magnetic field inside the solenoid.

A wire is wound on a long rod of material of relative permeability mu_(r) = 4000 to make a solenoid. If the current through the wire is 5 A and number of turns per unit length is 1000 per metre, then the magnetic field inside the solenoid is

The coercivity of a bar magnet is 120A//m . It is to be demagnetised by placing it inside a solenoid of length 120cm and number of turns 72. The current (in A) flowing through the solenoid is:

A thin solenoid of length 0.4 m and having 500 turns of wire carries a current 1A ,then find the magnetic field on the axis inside the solenoid.

A solenoid coil of 300 turns//m is carrying a current of 5A . The length of the solenoid is 0*5m and has a radius of 1cm . Find the magnitude of the magnetic field well inside the solenoid.

A wire is wound on a long rod of material of relative permeability mu_(r)=4000 to make a solenoid.If the current through the wire is 5A and number of turns per unit length is 1000 per metre,then the magnetic field inside the solenoid is:

An iron core is inserted into a solenoid 0.5 m long with 400 turns per unit length. The area of cross-section of the solenoid is 0.001m^(2) . (a) Find the relative permeability of the core when a current of 5 A flows through the solenoid winding. Under these conditions, the magnetic flux through the cross-section of the solenoid is 1.6xx10^(-3) Wb. (b) Find the inductance of the solenoid under these conditions.

In a solenoid, the corrent flowing through the wire is I and number of turns per unit length is n. This gives a magnetic field B inside the solenoid. If number of turn per unit length is increased to 2n, what will be the value of magnetic field in the solenoidgt

A solenoid of length 2m and of radius 1 cm has a winding carrying a current of 0.1 ampere per turn. Find the magnetic field strength inside the solenoid if the total number of turns is 2000.