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

(A) aluminium

(B) soft iron

(C) copper

(D) Steel

(A) silver

(B) soft iron

(C) Steel

(D) copper

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

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

Q.5. The unit of magnetic field is

(A) domain

(B) Henry

(C) Tesla

(D) weber

Q.6. The unit of magnetic flux is

(A) Henry

(B) Tesla

(C) gauss

(D) weber

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

(A) Cobalt

(B) Nickel

(C) iron

(D) copper

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

(A) Nitrogen

(B) Hydrogen

(C) iron

(D) oxygen

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

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

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

(A) Cobalt

(B) iron

(C) Aluminium

(D) nickel

Q.12. Which of the following is diamagnetic ?

(A) Bismuth

(B) Cobalt

(C) iron

(D) Nickel

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

(A) cobalt

(B) Brass

(C) Nickel

(D) Iron

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

(A) Diamagnetic

(B) paramagnetic

(C) Ferromagnetic

(D) Non Magnetic

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

(A) 10⁴

(B) 10⁻⁴

(C) 10³

(D) 10⁸

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

Q.17. Dimensional of Magnetic field is

(A) [M¹L⁰T²A⁻¹]

(B) [M¹L⁰T⁻²A⁻¹]

(C) [M⁰L⁰T²A⁻¹]

(D) [M⁰L⁰T⁻²A⁻¹]

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

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

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

(A) Fleming

(B) Orested

(C) Ampere

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

(A) solid

(B) liquid

(C) gas

(D) all of the above

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

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

(A) ampere

(B) ampere-meter

(C) ampere – sec

(D) none of these

Q.24. A dip circle measures

(A) inclination

(B) declination

(C) both (A) and (B)

(D) none of these

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