Magnetism And Matter Objective Questions In English

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Magnetism And Matter Objective Questions In English

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

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

2. The dimensional representation of magnetic flux density is

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

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

4. 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

5. Which of the following has higher magnetic susceptibility ?

• (A) diamagnetic
• (B) paramagnetic
• (C) ferromagnetic
• (D) None

6. 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

7. 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

8. The dimensions of magnetic permeability are

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

9. SI unit of magnetic pole strength is

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

10. A magnetic field exerts no force on a/an

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

11. Copper is

• (A) Paramagnetic
• (B) Ferromagnetic
• (C) Diamagnetic
• (D) Semi-conductor

12. Liquid and gases are

• (A) ferromagnetic
• (B) diamagnetic
• (C) paramagnetic
• (D) none

13. Nickel is

• (A) diamagnetic
• (B) paramagnetic
• (C) ferromagnetic
• (D) None

14. The distance between the two poles of a magnet is called

• (A) magnetic axis
• (B) magnetic field
• (C) magnetic length
• (D) magnetic moment

15. Which of the following is diamagnetic?

• (A) Na
• (B) Ca
• (C) O₂(STP)
• (D) N₂(STP)

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