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NEET UG PHYSICS MCQ: MAGNETISM AND MATTER
1
Hard
1 of 1
Understanding
+4 | -1
Given below are three statements.
Statement-A : Every magnetic configuration
must have a north and a south
pole.
Statement-B : Net magnetic flux through any
closed surface is zero, but net
electric flux may not be zero.
Statement-C : Materials showing Meissner
effect have zero magnetic
susceptibility.
In light of the above statements, choose the
correct answer from the options given below.
Statement-A : Every magnetic configuration
must have a north and a south
pole.
Statement-B : Net magnetic flux through any
closed surface is zero, but net
electric flux may not be zero.
Statement-C : Materials showing Meissner
effect have zero magnetic
susceptibility.
In light of the above statements, choose the
correct answer from the options given below.
View answer and explanation
Correct option: D
Only B is correct
Option D is correct. Only Statement-B is correct as magnetic monopoles do not exist, and Meissner effect materials have susceptibility of -1.
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Assertion: If a unit north pole rotates around a current carrying wire then work has to be done.
Reason: Magnetic field produced by current is always non - conservative in nature. The magnetic length of a bar magnet is 15 cm then its geometric length is If area vector flux density vector . Then magnetic flux linked with the coil is [Wb] The area of hysteresis loop of a material is equivalent to . When material is magnetized by an alternating field of then energy lost in one hour will be (density of material is ) A bar magnet of moment is placed in the magnetic field . The torque acting on the magnet is Assertion(A): Earth's magnetic field inside a closed iron box is less as compared to the out side.
Reason(R): The magnetic permeability of iron is low.
Reason: Magnetic field produced by current is always non - conservative in nature. The magnetic length of a bar magnet is 15 cm then its geometric length is If area vector flux density vector . Then magnetic flux linked with the coil is [Wb] The area of hysteresis loop of a material is equivalent to . When material is magnetized by an alternating field of then energy lost in one hour will be (density of material is ) A bar magnet of moment is placed in the magnetic field . The torque acting on the magnet is Assertion(A): Earth's magnetic field inside a closed iron box is less as compared to the out side.
Reason(R): The magnetic permeability of iron is low.