Do you need help learning for your NCERT Class 12 Physics exam? Students may want to download NCERT MCQ Questions for Class 12 Physics Chapter 5 Magnetism and Matter with Answers Pdf free download. These Magnetism and Matter Class 12 MCQs Questions with Answers can help understand the concepts score better in your Class 12 Physics Exam, so make sure you practice these! Check out chapter-wise MCQ Questions for Class 12 Physics with Answers.
Magnetism and Matter Class 12 MCQs Questions with Answers
Solve these Magnetism and Matter Multiple Choice Questions of Class 12 Physics Chapter 5 MCQ, so as not to miss out on any concept from being clear about what they mean!
I. Choose the correct answer
Question 1.
In a permanent magnet at room temperature
(a) magnetic moment of each molecule is zero.
(b) the individual molecules have non¬zero magnetic moment which are all perfectly aligned.
(c) domains are partially aligned.
(d) domains are all perfectly aligned.
Answer
Answer: (c) domains are partially aligned.
Question 2.
Two magnets of equal mass are joined at right angles to each other as shown that magnet 1 has a magnetic moment 3 times that of magnet 2. This arrangement is pivoted so that it is free to rotate in the horizontal plane. In equilibrium what angle will the magnet 1 subtend with the magnetic meridian?
(a) tan-1 (\(\frac { 1 }{2}\))
(b) tan-1 (\(\frac { 1 }{3}\))
(c) tan-1(1)
(d) 0°
Answer
Answer: (b) tan-1 (\(\frac { 1 }{3}\))
Question 3.
The ratio of the area of B-H curve and l-H curve of a substance in M.K.S. system is
(a) µ\(_{0}^{2}\)
(b) \(\frac { 1 }{µ_0^2}\)
(c) µ0
(d) \(\frac { 1 }{µ_0}\)
Answer
Answer: (c) µ0
Question 4.
The magnetic susceptibility is negative for:
(a) diamagnetic material only
(b) paramagnetic material only
(c) ferromagnetic material only
(d) paramagnetic and ferromagnetic materials
Answer
Answer: (a) diamagnetic material only
Question 5.
Hysteresis loops for two magnetic materials A and B are given below. These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use:
(a) A for electric generators and transformers.
(b) A for electromagnets and B for electric generators
(c) A for transformers and B for electric generators
(d) B for electromagnets and transformers
Answer
Answer: (d) B for electromagnets and transformers
Question 6.
An iron rod of length L and magnetic moment M is bent in the form of a semicircle. Now its magnetic moment will be
(a) M
(b) \(\frac { 2M }{π}\)
(c) \(\frac { M }{π}\)
(d) Mπ
Answer
Answer: (b) \(\frac { 2M }{π}\)
II. Fill in the blanks
Question 1.
The magnetic field strength at a point due to a short bar magnet on its axis varies ………………… as cube of distance of the point from the centre of magnet.
Answer
Answer: Inversely
Question 2.
……………….. is a vertical plane passing through the magnetic North and South Poles of the earth.
Answer
Answer: Magnetic meridian
Question 3.
………………. is a vertical plane passing through the geographic North and South Poles.
Answer
Answer: Geographic meridian
Question 4.
………………. at a place is defined as the acute angle between the magnetic meridian and the geographic meridian.
Answer
Answer: Declination
Question 5.
Lines drawn up on a magnetic map through places that have the same declination are called ……………… lines.
Answer
Answer: Isogonic
Question 6.
……………. at a place is defined as the angle between the direction of total intensity of the earth’s magnetic field and a horizontal line in the magnetic meridian at that place.
Answer
Answer: Dip
Question 7.
Lines drawn up on a magnetic map through places, which have the same dip, are called ………………. lines.
Answer
Answer: Isoclinic
Question 8.
The degree to which the magnetic field can penetrate or permeate a medium is called its magnetic ………………
Answer
Answer: Permeability
Question 9.
For paramagnetic materials, magnetic susceptibility is related with temperature as inversely proportional to ………………..
Answer
Answer: Temperature
Question 10.
There is no effect of temperature on ……………… type of materials.
Answer
Answer: Diamagnetic
Question 11.
The ability of a material to retain magnetism after removal of magnetising field is called ………………
Answer
Answer: Retentivity
Question 12.
The measure of the magnetic intensity required to destroy the residual magnetism of the specimen is called ……………..
Answer
Answer: Coercivity
This NCERT MCQ Questions for Class 12 Physics Chapter 5 Magnetism and Matter with Answers Pdf free download have been put together to help students understand the CBSE Class 12 Physics Magnetism and Matter MCQs Multiple Choice Questions with Answers. Hope you found this helpful!