NEET Physics Earths Magnetism Magnetic Materials and their Properties MCQs Set A

a) vary from place to place on the earth’s surface

b) having very high value

c) zero everywhere

d) constant everywhere

Answer: vary from place to place on the earth’s surface

Question: Which of the following is responsible for the earth’s magnetic field?

a) Convective currents in earth’s core.

b) Diversive current in earth’s core.

c) Rotational motion of earth

d) Translational motion of earth.

Answer: Convective currents in earth’s core.

Question:  The most appropriate magnetization M versus magnetising field H curve for a paramagnetic substance is

a) A

b) B

c) C

d) D

Answer: A

Question: The lines of force due to earth’s horizontal magnetic field are

a) concentric circles

b) curved lines

c) parallel and straight

d) elliptical

Answer: concentric circles

Question: The earth’s magnetic field always has a vertical component except at the

a) magnetic equator

b) geographic north pole

c) magnetic poles

d) latitude 45º

Answer: magnetic equator

More Questions.....................................

Question: At magnetic poles, the angle of dip is

a) 90º

b) zero

c) 30º

d) 45º

Answer:  90º

Question:  One can define ...A... of a place as the vertical plane which passes through the imaginary line joining the magnetic North and the South–poles. Here, A refers to

a) magnetic meridian

b) magnetic inclination

c) geographic meridian

d) magnetic declination

Answer: magnetic meridian

Question: The ratio of intensity of magnetisation and magnetising field is called

a) magnetic susceptibility

b) magnetic intensity

c) permeability

d) magnetic intensity

Answer: magnetic susceptibility

Question: At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively

a) zero, maximum

b) maximum, maximum

c) maximum, minimum

d) minimum, minimum

Answer:  zero, maximum

Question: The magnetic compass is not useful for navigation near the magnetic poles, since

a) H = 0

b) V = 0

c) R = 0

d) None of these

Answer: H = 0

Question: Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called

a) paramagnetic

b) antimagnetic

c) diamagnetic

d) ferromagnetic

Answer: paramagnetic

Question: The magnetic susceptibility for diamagnetic materials is

a) small and negative

b) large and positive

c) large and negative

d) small and positive

Answer:  small and negative

Question: Among which of the following the magnetic susceptibility does not depend on the temperature?

a) Dia-magnetism

b) Ferro-magnetism

c) Para-magnetism

d) Ferrite

Answer: Dia-magnetism

Question: Curie temperature is the temperature above which

a) a ferromagnetic material becomes paramagenetic

b) a paramagnetic material becomes diamagnetic

c) a ferromagnetic material becomes diamagnetic

d) a paramagnetic meterial becomes ferromagnetic

Answer: a ferromagnetic material becomes paramagenetic

Question: A material is placed in a magnetic field and it is thrown out of it. Then the material is

a) diamagnetic

b) non-magnetic

c) paramagnetic

d) ferromagnetic

Answer: diamagnetic