Home
Class 12
PHYSICS
Assertion (A): Earth's magnetic field in...

Assertion (A): Earth's magnetic field inside a closed iron box is less as compared to the outside
Reason (R ): The magnetic permeability of iron is low

A

If both Assertain and Reason are true and Reason is the correct explanation of Assertain

B

If both Assertain and Reason are true but Reason is not correct explantion of Assertain

C

If Assertion is true but Reason is false

D

If Assertion is false but Reason in true.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion (A): The earth's magnetic field is due to iron present in its core. Reason (R ): At a high tempeature magnet losses its magnetic property or magnetism.

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 Wbm^(-2) and 150Am^(-1) respectively. The relative permeability of iron is : (mu_(0)=4pixx10^(-7)"henry"//m)

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 Wbm^(-2) and 150Am^(-1) respectively. The relative permeability of iron is : (mu_(0)=4pixx10^(-7)"henry"//m)

Assertion : Earth's magnetic field does not affect the working of a moving coil galvanometer. Reason: The earth's magnetic field is quite weak as compared to magnetic field produced in the moving coil galvanometer.

When a piece of a ferromagnetic sobstance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is

Assertion : The magnetic Held lines of the earth resemble that of a magnetic dipole located at the centre of the earth. Reason : The axis of the dipole coincide with the axis of rotation of the earth.

Assertion: Magnetic field strength at a point on axial line of a bar magnet is along South to North pole of magnet. Reason: The magnetic field strength can never be along North to South pole of magnet.

Assertion (A): The net magnetic flux coming out of a closed surface is always zero. Reason (R ): Unlike poles of equal strength exist together

Assertion : Magnetic field is useful in producing parallel beam of charged particle. Reason : Magnetic field inhibits the motion of charged particle moving across it.

(A): Magnetic field lines can be entirely confined within the core of a toroid. But not within a straight solenoid. (R) : The magnetic field inside the solenoid is uniform.