The use of permanent magnets is. not made in_____________?
A. magnetoes
B. energy meters
C. transformers
D. loud-speakers
Magnetism and Electromagnetism
Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of_________________?
Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of_________________?
A. 2 x 1(T2 N/m)
B. 2 x KT3 N/m
C. 2 x 10″5 N/m
D. 2x 1(T7 N/m)
The main constituent of permalloy is_____________?
The main constituent of permalloy is_____________?
A. cobalt
B. chromium
C. nickel
D. tungsten
Paramagnetic materials have relative permeability________________?
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
Gilbert is a unit of_______________?
Gilbert is a unit of_______________?
A. electromotive force
B. magnetomotive force
C. conductance
D. permittivity
Which of the following is a ferromagnetic material ?
Which of the following is a ferromagnetic material ?
A. Tungsten
B. Aluminium
C. Copper
D. Nickel
Substances which have permeability less than the permeability of free space are known as_____________?
Substances which have permeability less than the permeability of free space are known as_____________?
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. bipolar
In the left hand rule, forefinger always represents______________?
In the left hand rule, forefinger always represents______________?
A. voltage
B. current
C. magnetic field
D. direction of force on the conductor
Ferrites are a sub-group of_______________?
Ferrites are a sub-group of_______________?
A. non-magnetic materials
B. ferro-magnetic materials
C. paramagnetic materials
D. ferri-magnetic materials
Reciprocal of permeability is____________?
Reciprocal of permeability is____________?
A. reluctivity
B. susceptibility
C. permittivity
D. conductance