Physics Class 12th Chapter-5 Magnetism And Matter Most VVI Objective Questions

Q.1. permanent magnets are made

(A) aluminium

(B) soft iron

(C) copper

(D) Steel

Answer:- (D)

Q.2. Temporary magnets are made 

(A) silver

(B) soft iron

(C) Steel

(D) copper

Answer:- (B)

Q.3. Where is the maximum attraction power of magnets 

(A) in the middle

(B) on the both sides

(C) every place is equal

(D) on the magnetic axis

Answer:- (B)

Q.4. Where is the least power of a magnet ?

(A) every place is equal

(B) in the middle

(C) on magnetic axis

(D) on both sides

Answer:- (B)

Q.5. The unit of magnetic field is 

(A) domain

(B) Henry

(C) Tesla

(D) weber

Answer:- (C) 

Q.6. The unit of magnetic flux is 

(A) Henry

(B) Tesla

(C) gauss

(D) weber

Answer:- (D) 

Q.7. Which of the following is not  an iron magnet material

(A) Cobalt

(B) Nickel

(C) iron

(D) copper

Answer:- (D)

Q.8. Which of the following is a paramagnetic material 

(A) Nitrogen

(B) Hydrogen

(C) iron

(D) oxygen

Answer:- (D) 

Q.9. To what point does the needle of magnetic compass ?

(A) magnetic south

(B) magnetic north

(C) magnetic north and magnetic south

(D) none of these

Answer:- (C)

Q.10. The angle between the magnetic meridian and geometrical meridian is called 

(A) magnetic field

(B) magnetic declination

(C) magnetic moment

(D) none of these

Answer:- (B)

Q.11. Which of the following is not attracted by a metal magnet ? 

(A) Cobalt

(B) iron

(C) Aluminium

(D) nickel

Answer:- (C) 

Q.12. Which of the following is diamagnetic ? 

(A) Bismuth

(B) Cobalt

(C) iron

(D) Nickel

Answer:- (A) 

Q.13. Which one of the following is non – magnetic substance 

(A) cobalt

(B) Brass

(C) Nickel

(D) Iron

Answer:- (B) 

Q.14. The magnetic susceptibility of a material is negative the material is 

(A) Diamagnetic

(B) paramagnetic

(C) Ferromagnetic

(D) Non Magnetic

Answer:- (A) 

Q.15. Gauss and Tesla both are unit of magnetic field where 1T……. G 

(A) 10⁴

(B) 10⁻⁴

(C) 10³

(D) 10⁸

Answer:- (A) 

Q.16. When current is passed through a conductor then surrounding the conductor is generated 

(A) electric field

(B) magnetic field

(C) no field

(D) gravitational field

Answer:- (B) 

Q.17. Dimensional of Magnetic field is 

(A) [M¹L⁰T²A⁻¹]

(B) [M¹L⁰T⁻²A⁻¹]

(C) [M⁰L⁰T²A⁻¹]

(D) [M⁰L⁰T⁻²A⁻¹]

Answer:- (B) 

Q.18. In a cyclotron, the angular frequency does not depend on  a charged particle is 

(A) Mass

(B) Charge

(C) Magnetic field

(D) Speed

Answer:- (D) 

Q.19. The work done is turning a magnet (magnetic moment M)  through θ when it is  suspended in the magnetic meridian 

(A) MB cos

(B) MB (1- cosθ)

(C) MB secθ

(D) none of these

Answer:- (B) 

Q.20. The magnetic effect of electric current was first discovered by 

(A) Fleming

(B) Orested

(C) Ampere

(D) Faraday

Answer:- (B) 

Q.21. Which of the following can be ferromagnetic ?

(A) solid

(B) liquid

(C) gas

(D) all of the above

Answer:- (A) 

Q.22. The relative permeability of a diamagnetic material is 

(A) greater than 1

(B) equal to 1

(C) less than 1

(D) none of these

Answer:- (C) 

Q.23. which of the following is the unit of pole strength ? 

(A) ampere

(B) ampere-meter

(C) ampere – sec

(D) none of these

Answer:- (B) 

Q.24. A dip circle measures 

(A) inclination

(B) declination

(C) both (A) and (B)

(D) none of these

Answer:- (A)

Q.25. In moving towards north pole from the magnetic equator, the magnetic dip 

(A) Decreases

(B) increases

(C) remains constant

(D) none of these

Answer:- (B)
















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