The relative permeability of materials is not constant.

Paramagnetic materials have relative permeability

A

slightly less than unity

B

equal to unity

C

slightly more than unity

D

equal to that ferromagnetic mate rials

Substances which have permeability less than the permeability of free space are known as

A

Ferromagnetic

B

Paramagnetic

C

Diamagnetic

D

Bipolar

Relative permeability of vacuum is

A

1

B

1 H/m

C

$$4\pi \times {10^{ - 7}}$$

D

$$\frac{1}{4}$$

Superconducting metal in super conducting state has relative permeability of

A

Zero

B

One

C

Negative

D

More than one

The relative permeability of a ferromagnetic material is

A

Less than one

B

More than one

C

More than 10

D

More than 100 or 1000

The relative permeability is less than unity is case of

A

ferromagnetic materials

B

ferrites

C

non-ferrous materials

D

diamagnetic materials

The unit of relative permeability is

A

henry/metre

B

henry

C

henry/sq. m

D

it is dimensionless

Which one of the following kinds of materials has the lowest permeability?

A

A diamagnetic material

B

A paramagnetic material

C

A feiTomagnetic material

D

All of the above

E

None of the above

Which one of the following kinds of materials has the highest permeability?

A

A diamagnetic material

B

A ferromagnetic material

C

A paramagnetic material

D

All of the above

E

None of the above

Out of the following, the materials having maximum magnetic permeability is

A

Silicon steel (Si = 4%)

B

Cast iron

C

Wrought iron

D

Mild steel

The relative permeability of materials is not constant.

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