Test: Magnetic Field


10 Questions MCQ Test Physics Class 12 | Test: Magnetic Field


Description
This mock test of Test: Magnetic Field for Class 12 helps you for every Class 12 entrance exam. This contains 10 Multiple Choice Questions for Class 12 Test: Magnetic Field (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Magnetic Field quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Magnetic Field exercise for a better result in the exam. You can find other Test: Magnetic Field extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

What is the angle of dip at a place where horizontal component of earth’s magnetic field is equal to the vertical component?

Solution:
QUESTION: 2

How can a magnetic field be produced?

Solution:

 An electric current as well as the permanent magnet produces a magnetic field whereas a temporary magnet fails to do so.

QUESTION: 3

Which one of the Maxwell’s laws leads to the conclusion that there are no magnetic field loops that are not closed?

Solution:

Gauss’s law for magnetism states that no magnetic monopoles exists and that the total flux through a closed surface must be zero.

QUESTION: 4

What is the relation between dipole moment pm, volume of bar magnet V and intensity of magnetization M? 

Solution:
QUESTION: 5

If we place a bar magnet in the magnetic meridian with its north pole towards geographic north, the neutral point will be:

Solution:
QUESTION: 6

Which combination of magnetic field lines and poles shows two magnets repelling each other?

Solution:
QUESTION: 7

Magnetic field strength due to a short bar magnet on its axial line at a distance x is B. What is its value at the same distance on the equatorial line?

Solution:
QUESTION: 8

When the switch is closed a magnetic field is produced by the coil. Which answer shows the shape of the field?

Solution:
QUESTION: 9

If the magnet is suspended at an angle 30° to the magnetic meridian, the dip needle makes an angle 60o with the horizontal. What is the true dip?​

Solution:

 Answer :- b

Solution :- Angle of dip, δ=30o

∴ tanδ′ = tanδ/cosθ

tanδ = tan 60*cos30o = [(3)^½]*[(3)^1/2/2]​

= 3/2

∴ Real dip δ′ = tan−1 (3/2)

QUESTION: 10

A compass has a small balanced pointer that always points North-South. This is because:

Solution:

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