Magnetism and Matter Online Objective Test | Magnetism and Matter Online Objective Test

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q1. considering the magnetic field of the earth,the correct relation of the geographic pole and the magnetic poles is

A. north magnetic pole is located near the south geographic pole and south magnetic pole is located near the north geographic pole

B. north magnetic pole is located near the south geographic pole but south magnetic pole is not located near the north geographic pole

C. north magnetic pole is not located near the south geographic pole but south magnetic pole is located near the north geographic pole

D. north magnetic pole is located near the north geographic pole

Answer : Option A
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q2. magnetic declination and dip refer to

A. angle between longitudinal magnetic axis and latitdinal geographic axis,angle up or down with respect to horizontal of a magnetic needle

B. angle between magnetic axis and geographic axis,angle up or down with respect to horizontal of a magnetic needle

C. angle between magnetic axis and geographic axis,angle up or down with respect to longitude of a magnetic needle

D. angle between latitude of magnetic axis and geographic axis,angle up or down with respect to horizontal of a magnetic needle

Answer : Option B
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q3.

magnetic intensity is defined by

B⃗ μ30−M⃗

\frac{H_{E}}{Z_{E}}

B. B⃗ μ
0−M⃗

C. 2B⃗ μ0−M⃗

D. B⃗ μ20−M⃗

Answer : Option B
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q4.

\vec{H}

=magnetic intensity,

χ

=susceptibility, magnetic moment per unit volume

\vec{M}

equals

A. 2χH⃗

B. χH⃗

C. χ2H⃗

D. πχH⃗

Answer : Option B
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q5.

\vec{H}

=magnetic intensity,

χ

=susceptibility, magnetic moment per unit volume

\vec{M}

equals

A. μ0μr

B. μ00.8μr

C. μ01.2μr

D. μ01.5μr

Answer : Option A
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q6. Magnetic material differences are explained by

A. number of protons

B. number of neutrons

C. atoms contain spinning electrons, and their spin forms microscopic current loops that produce magnetic fields

D. atoms contain moving electrons, and these electrons form microscopic current loops that produce magnetic fields of their own.

Answer : Option D
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q7. Diamagnetic substances are

A. those which have tendency to move from weaker to the stronger part of the external magnetic field

B. those that are uneffected by external magnetic fields

C. those that develop a net magnetic moment in direction of applied field

D. those which have tendency to move from stronger to the weaker part of the external magnetic field

Answer : Option D
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q8. For diamagnetic materials

A. additional field caused by atoms is always in same direction as that of the external field

B. additional field caused by atoms is always opposite in direction to that of the external field

C. additional field caused by atoms is always perpendicular in direction to that of the external field

D. additional field caused by atoms is always parallel in direction to that of the external field

Answer : Option B
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q9. For paramagnetic materials

A. spin magnetic moments of the electrons are zero

B. orbital and spin magnetic moments of the electrons are of the order of bohr magneton

C. orbital and spin magnetic moments of the electrons are less than zero

D. orbital magnetic moments of the electrons are zero

Answer : Option B
Explaination / Solution:
No Explaination.

# Magnetism and Matter # CBSE 12TH PHYSICS Prepare / Learn

Q10. In Ferromagnetic materials

A. atomic magnetic moments are random in strong external fields

B. strong interactions between atomic magnetic moments cause them to line up parallel to each other in regions called magnetic domains even if there is no external field

C. strong interactions between atomic magnetic moments cause them to line up anti parallel to each other in external field

D. weak interactions between atomic magnetic moments cause them to line up anti parallel to each other in external field

Answer : Option B
Explaination / Solution:
No Explaination.

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