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)