Magnetism And Matter

Physics
2741 Views

Assertion (A): A magnet remains stable, If it aligns itself with the field

Reason (R): The P.E. of a bar magnet is minimum, if it is parallel to magnetic field.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true and R is not correct explanation of A.
C
A is true, But R is false
D
A is false, But R is true
Easy
View solution>

Magnetic lines of force are:

A
continuous
B
discontinuous
C
some times continuous and some times discontinuous
D
nothing can be said
Easy
View solution>

In case of a bar magnet, lines of magnetic induction

A
start from the north pole and end at the south pole
B
run continuously through the bar magnet and outside
C
emerge in circular paths from the middle of the bar
D
are produced only at the north pole like rays of light from a bulb
Easy
View solution>

Out of dia, para and ferromagnetism, the universal property of all substances is

A
diamagnetism
B
paramagnetism
C
ferromagnetism
D
antiferromagnetism
Easy
View solution>

Assertion (A) : To protect any instrument from external magnetic field, it is put inside an iron box
Reason (R) : Iron is a ferromagnetic substance

A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true and R is not correct explanation of A
C
A is true, but R is false
D
A is false, but R is true
Easy
View solution>

A compass needle, which shows the direction at the earth's magnetic pole is

A
Vertical
B
No particular direction
C
Bent at 45 to the vertical
D
Horizontal
Easy
View solution>

The relative permeability of silicon is and that of palladium is , choose the correct option from the following :

A
silicon is paramagnetic and palladium is ferromagnetic
B
silicon is ferromagnetic and palladium is paramagnetic
C
silicon is diamagnetic and palladium is paramagnetic
D
Both are paramagnetic
Easy
View solution>

Ferromagnetic ore properties are due to

A
filled inner sub-shells
B
vacant inner sub-shells
C
partially filled inner sub-shells
D
all the sub-shells equally filled
Easy
View solution>

Permanent magnets are made from

A
diamagnetic substances
B
paramagnetic substance
C
ferromagnetic substances
D
wood
Easy
View solution>