MCQ on Magnetism: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Magnetism, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

MCQ on Magnetism

Q1. A long magnet is cut into two parts such that the ratio of their lengths is 2:1. What is the ratio pole strength of both the section?
a) 1:2
b) 2:1
c) 4:1
d) Equal

Q2. The magnetism of a magnet is due to ________.
a) earth
b) cosmic rays
c) due to pressure of big magnet inside the earth
d) spin motion of electrons

Q3. Which of the following materials is the most suitable for making a permanent magnet?
a) Soft Iron
b) Nickel
c) Copper
d) Steel

Q4. What happens to the magnetic moment if a hole is made at the centre of a bar magnet?
a) Decreases
b) Increases
c) Not a change
d) None of the above

Q5. For which of the following is magnetic susceptibility negative?
a) Paramagnetic and Ferromagnetic materials
b) Paramagnetic Materials only
c) Ferromagnetic Materials only
d) Diamagnetic Materials

Q6. What happens to the magnetic needle kept in a non-uniform magnetic field?
a) It experiences force but not torque
b) It experiences torque but not force
c) It experiences both force and torque
d) It neither experiences force nor torque

Q7. Which of the following is the unit of magnetic flux density?
a) Weber/meter^2
b) Tesla
c) Newton/ampere-metre
d) All of the above

Q8. Which of the following statements is true about magnetic lines of force?
a) Magnetic lines of force are always closed.
b) Magnetic lines of force always intersect each other.
c) Magnetic lines of force tend to crowd far away from the poles of the magnet
d) Magnetic lines of force do not pass through the vacuum.

Q9. The Hysteresis loops for two magnetic materials A and B are given below:

These materials are used to make magnets for transformer core, electric generators and electromagnet core. Which of the following is true about the given magnets?
a) A for transformers and B for electric generators
b) A for electric generators and transformers
c) B for electromagnets and generators
d) A for electromagnets and B for electric generators

Q10. A sensitive magnetic field instrument can be effectively shielded from the external magnetic field by placing it inside which of the following materials?
a) Plastic Material
b) Teak Wood
c) Soft Iron of high permeability
d) A metal of high conductivity

Q11. The magnetic field at a point x on the axis of a mall bar magnet is equal to the field at a point y on the equator of the same magnet. The ratio of the distances of x and y from the centre of the magnet is
a) 2^-1/3
b) 2^1/3
c) 2^3
d) 2^-3

Q12. Which of the following statements is true about magnetic field intensity?
a) Magnetic field intensity is the number of lines of force crossing per unit volume.
b) Magnetic field intensity is the number of lines of force crossing per unit area.
c) Magnetic field intensity is the magnetic induction force acting on a unit magnetic pole.
d)  Magnetic field intensity is the magnetic moment per unit volume.

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By Team Learning Mantras