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Magnetism

53 MCQ questions with answers and explanations · page 1 of 3

Test yourself▶ 25 question test▶ 50 question test

Q1. Under what conditions can permanent magnetization be done?

  1. Airon cast
  2. Bwrought iron
  3. Ccast iron
  4. Dsteel
Show answer & explanation

Answer: D) steel

Q2. Temporary magnets are made from-

  1. Aof steel
  2. Bsoft iron
  3. Ccopper
  4. DSilver
Show answer & explanation

Answer: B) soft iron

Q3. Why are electromagnets made of soft iron?

  1. ADue to low magnetic susceptibility and low retentivity
  2. BDue to high magnetic tendency and low holding capacity
  3. CDue to high magnetic tendency and high holding capacity
  4. DDue to low magnetic susceptibility and high holding capacity
Show answer & explanation

Answer: C) Due to high magnetic tendency and high holding capacity

Q4. If a magnet is divided into two parts then-

  1. ABoth parts become separate magnets.
  2. BOne part becomes magnetized and the other part becomes non-magnetic.
  3. COne part becomes the North Pole and the other part becomes the South Pole.
  4. DBoth parts become non-magnetic
Show answer & explanation

Answer: A) Both parts become separate magnets.

Q5. Where is the attractive force of a magnet the greatest?

  1. Aon both sides
  2. Bin the middle
  3. Con the magnetic axis
  4. DIt is the same everywhere
Show answer & explanation

Answer: A) on both sides

Q6. Where is the attractive force of a magnet the least?

  1. Aon both sides
  2. Bin the middle
  3. Con the magnetic axis
  4. DIt is the same everywhere
Show answer & explanation

Answer: B) in the middle

Q7. Which of the following statements is false?

  1. AThere is repulsion between like poles of a magnet
  2. BThere is attraction between opposite poles of a magnet
  3. CAn isolated pole does not exist
  4. DIf a magnet is broken in half, its two poles separate.
Show answer & explanation

Answer: D) If a magnet is broken in half, its two poles separate.

Q8. The unit of magnetic field is-

  1. AGauss
  2. BWeber
  3. CHenry
  4. Ddomain
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Answer: A) Gauss

Q9. The unit of magnetic flux is-

  1. AWeber
  2. BGauss
  3. CHertz
  4. DTesla
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Answer: A) Weber

Q10. Which of the following is not a ferromagnetic substance?

  1. AIron
  2. BNickel
  3. CCopper
  4. DCobalt
Show answer & explanation

Answer: C) Copper

Q11. Which of the following is a paramagnetic substance?

  1. Ahydrogen
  2. Bnitrogen
  3. Coxygen
  4. DIron
Show answer & explanation

Answer: C) oxygen

Q12. What are the numerous microscopic structures of atoms within ferromagnetic materials called?

  1. Asolenoid
  2. BToroid
  3. Cdomain
  4. DNone of these
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Answer: C) domain

Q13. The number of atoms in 1 domain is-

  1. A10 12to 1015
  2. B1015 to 1018
  3. C10 18to 1021
  4. D10 21to 1024
Show answer & explanation

Answer: C) 10 18to 1021

Q14. The material of which a permanent magnet is made is—

  1. Aferromagnetic
  2. Bdiamagnetic
  3. Cantiferromagnetic
  4. DThe above three
Show answer & explanation

Answer: A) ferromagnetic

Q15. In which direction does a freely suspended magnetic needle rest?

  1. ANorth-west direction
  2. BNorth South Direction
  3. CNorth-East direction
  4. DSouth-west direction
Show answer & explanation

Answer: B) North South Direction

Q16. Which way does the needle of a magnetic compass point?

  1. Amagnetic north
  2. Bmagnetic south
  3. Cmagnetic north and magnetic south
  4. DNone of these
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Answer: C) magnetic north and magnetic south

Q17. Which of the following is a non-magnetic substance?

  1. AIron
  2. BNickel
  3. CCobalt
  4. DBrass
Show answer & explanation

Answer: D) Brass

Q18. It is difficult to magnetize steel because its-

  1. ABecause of its low magnetic
  2. BDue to the high carrying capacity
  3. CBecause of its high magnetic
  4. DDue to the high density
Show answer & explanation

Answer: B) Due to the high carrying capacity

Q19. A freely suspended magnet always remains at-

  1. Ain the north-east direction
  2. Bin the north-west direction
  3. Cin the north-south direction
  4. Din the south-west direction
Show answer & explanation

Answer: C) in the north-south direction

Q20. Which one of the following is paramagnetic in nature?

  1. AIron
  2. Bhydrogen
  3. Coxygen
  4. Dnitrogen
Show answer & explanation

Answer: C) oxygen

Q21. Which of the following is electromagnetically non-magnetic?

  1. ANickel
  2. BCobalt
  3. CChromium
  4. Dcopper
Show answer & explanation

Answer: D) copper

Q22. The angle between the magnetic meridian and the geographical meridian is called-

  1. Amagnetic inclination
  2. Bmagnetic moment
  3. Cmagnetic compass
  4. Dnone of these
Show answer & explanation

Answer: C) magnetic compass

Q23. Which of the following metals is not attracted by a magnet?

  1. AIron
  2. BNickel
  3. CCobalt
  4. Daluminium
Show answer & explanation

Answer: D) aluminium

Q24. Which of the following is diamagnetic?

  1. AIron
  2. BBismuth
  3. CNickel
  4. DCobalt
Show answer & explanation

Answer: B) Bismuth

Q25. A powerful magnet

  1. Aattracts all substances
  2. BAttracts only iron and its alloys
  3. CAttracts only iron and its alloys, but does not repel any other metal.
  4. Dattracts some substances, repels others
Show answer & explanation

Answer: C) Attracts only iron and its alloys, but does not repel any other metal.

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