5. MAGNETISM AND MATTER( Objective Question Answer 2022 )


1. Which of the following has a low value in ferrites ?

(A) Conductivity
(B) Permeability
(C) Magnetic susceptibility
(D) All the above

Answer тЗТ A

2. The dimensional representation of magnetic flux density is ;

(A) [MLT-2]
(B) [MLT-2A-1]
(C) [MLT-2A-2]
(D) [MT-2A-1]

Answer тЗТ D

3. Tangent law is applicable only when :

(A) two uniform and mutually perpendicular magnetic fields exist
(B) two magnetic fields exist
(c) horizontal component of earth’s magnetic field is present
(D) uniform magnetic field are used

Answer тЗТ A

4. Ferrites may be :

(A) ant ferromagnetic
(B) ferromagnetic
(C) ferrimagnetic
(D) None of the above

Answer тЗТ B

5. A magnetic dipole moment is a vector quantity directed from :

(A) S to N
(B) N to S
(C) E to W
(D) W to E

Answer тЗТ A

6. The force acting per unit length of a semi circular wire of radius R carrying a current I is :

 

The force acting per unit length of a semi circular wire of radius

Answer тЗТ A

7. Which of the following has higher magnetic susceptibility ?

(A) diamagnetic
(B) paramagnetic
(C) ferromagnetic
(D) None of these

Answer тЗТ C

8. The magnetic field of earth is due to :

(A) induction effect of the sun
(B) the presence of a large magnet at the centre of the earth
(C) interaction of cosmic rays with the current of earth
(D) motion and distribution of some material in an outside the earth

Answer тЗТ D

9. Direction of magnetic field can determined by :

(A) declination only
(B) inclination only
(C) inclination and horizontal component of field
(D) declination and horizontal component of field

Answer тЗТ B

10. The dimensions of magnetic permeability are :

(A) [MLT-2A-2]
(B) [ML2T2A-2]
(C) [ML2T-2A-1]
(D) [M-1LT-2A-2]

Answer тЗТ A

11. A magnetic field exerts no force on a/an :

(A) magnetic
(B) unmagnetised iron bar
(C) moving charge
(D) charge at rest

Answer тЗТ D

12. Susceptibility is +ve and large for substances.

(A) ferromagnetic
(B) paramagnetic
(C) diamagnetic
(D) non-magnetic

Answer тЗТ A

13. SI unit of magnetic pole strength is :

(A) Ampere-metre
(B) Ampere-metre2
(C) Ampere2-metre
(D) Tesla-metre

Answer тЗТ B

Class 12th physics objective question in English

S.N Physics Objective English Medium
1. ┬аELECTRIC CHARGES AND FIELDS
2. LECTROSTATIC POTENTIAL AND CAPACITANCE
3. CURRENT ELECTRICITY
4. MOVING CHARGES AND MAGNETISM
5. MAGNETISM AND MATTER
6. ELECTROMAGNETIC INDUCTION
7. ALTERNATING CURRENT
8. ELECTROMAGNETIC WAVES
9. RAY OPTICS AND OPTICAL INSTRUMENTS
10. WAVE OPTICS
11. DUAL NATURE OF MATTER AND RADIATION
12. ATOMS
13. NUCLEI
14. SEMI CONDUCTOR ELECTRONICS┬а
15. COMMUNICATION SYSTEMS

 

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