Related Questions

When a material is in superconducting state and a magnetic field is applied
A The superconducting property is not affected
B The superconducting property may be affected and resistivity may increase from zero to a low value
C The superconducting property may be destroyed
D The material may become an insulator
The elements which become superconducting at extremely low temperatures are
A Good conductors at room temperature
B Ferromagnetic at room temperature
C Relatively poor conductors at room temperature
D Insulators at room temperature
Substances which have permeability less than the permeability of free space are known as
A Ferromagnetic
B Paramagnetic
C Diamagnetic
D Bipolar
A Fast food shop sells pizza in 3 sizes: large, super, and jumbo. One day the shop sold 240 pizzas, and the ratio of sales of large to super to jumbo was 8 : 17 : 15. How many jumbo pizzas were sold that day?
A 48
B 90
C 102
D 108
Relative permeability of vacuum is
A 1
B 1 H/m
C $$4\pi \times {10^{ - 7}}$$
D $$\frac{1}{4}$$
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 of materials is not constant.
A diamagnetic
B paramagnetic
C ferromagnetic
D insulating
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
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

Next steps