Class 12 Physics MCQ Chapter 5 Magnetism and Matter Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Physics MCQ Chapter 5 Magnetism and Matter Question Answer in English and select need one. AHSEC Class 12 Physics Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Physics MCQ Class 12 Solutions.
Class 12 Physics MCQ Chapter 5 Magnetism and Matter
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Physics Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Physics MCQ Question Answer English Medium for All Chapters, You can practice these here.
Magnetism and Matter
Chapter: 5
| MCQs |
Choose the correct option:
1. For a vibration magnetometer, the time period of the suspended bar magnet can be reduced by:
(a) Moving it towards the south pole of earth.
(b) Moving it towards the north pole of earth.
(c) Moving it towards the equator.
(d) Any of them.
Ans: (c) Moving it towards the equator.
2. Which of the following is another term for magnetization?
(a) Magnetic neutrality.
(b) Magnetic polarisation.
(c) Magnetic power.
(d) Magnetic moment.
Ans:(b) Magnetic polarisation.
3. The work done in turning a magnet of magnetic moment M by an angle of 90° from the magnetic meridian is n times the corresponding work done in turning it through an angle of 60° deg The value of n is:
(a) 1
(b) 2
(c) 1/2
(d) ¼
Ans: (b) 2
4. Both magnetization and magnetic intensity have the same unit.
(a) True.
(b) False.
(c) None of the above.
(d) All of the above.
Ans:(a) True.
5. A magnet 10 cm long having a pole strength of 2 ampere-metre is deflected through 30° from the magnetic meridian. The horizontal component of earth’s magnetic field is 0.32 × 10-4 T The value of deflecting couple is:
(a) 64 × 10-7 Nm
(b) 2.5 × 10-7 Nm
(c) 32 × 10-7 Nm
(d) 1.6 × 10-7 Nm
Ans: (c) 32 × 10-7 Nm
6. Which among the following is not attracted by magnets?
(a) Iron.
(b) Cobalt.
(c) Copper.
(d) Nickel.
Ans: (c) Copper.
7. The magnetic needle of a tangent galvanometer is deflected at an angle of 30° deg due to a coil. The horizontal component of earth’s magnetic field is 0.34 × 10-4 T along the plane of the coil. The field due to coil is:
(a) 1.96 × 10-4 T
(b) 1.96 × 10-6 T
(c) 1.96 × 104 T
(d) 1.96 × 105 T
Ans: (b) 1.96 × 10-6 T
8. Which of the following is not a basic property of magnets.
(a) Magnet exists as a monopole.
(b) Attractive property.
(c) Directive property.
(d) Like poles repel and unlike poles attract.
Ans: (a) Magnet exists as a monopole.
9. The angle of dip is 90° deg at:
(a) Earth’s magnetic poles.
(b) Equator.
(c) Both (a) and.
(d) None of these.
Ans: (a) Earth’s magnetic poles.
10. Which of the following is a natural magnet?
(a) Magnetic needle.
(b) Bar magnet.
(c) Magnetite.
(d) Horseshoe magnet.
Ans: (c) Magnetite.
11. A bar magnet has a magnetic moment of 2.5 JT-1 and is placed in a magnetic field of 0.2 T. Work done to antiparallel position relative to the field direction is:
(a) Zero
(b) 0.5 J
(c) 2.0 J
(d) 1 J
Ans: (d) 1 J
12. A magnet can only repel another magnet. So, ‘X’ is a surer test of magnetism. Identify X.
(a) Directive.
(b) Repulsion.
(c) Remanence.
(d) Hysteresis.
Ans: (b) Repulsion.
13. The dimensions of magnetic dipole moment:
(a) ⅠL2
(b) ⅠL2/R
(c) ⅠL
(d) None of the above.
Ans: (d) None of the above.
14. A bar magnet of the magnetic moment 5 Am2 has poles 20 cm apart. Calculate the pole strength.
(a) 250 Am.
(b) 4 Am.
(c) 100 Am.
(d) 25 Am.
Ans: (d) 25 Am.
15. Most of the substances show the property of:
(a) Diamagnetism.
(b) Paramagnetism.
(c) Ferromagnetism.
(d) None of the above.
Ans: (b) Paramagnetism.
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