The unit of flux is the same as that of_______________?
A. reluctance
B. resistance
C. permeance
D. pole strength
Month: December 2018
The commonly used material for shielding or screening magnetism is____________?
The commonly used material for shielding or screening magnetism is____________?
A. copper
B. aluminium
C. soft iron
D. brass
The Biot-savart’s law is a general modification of_______________?
The Biot-savart’s law is a general modification of_______________?
A. Kirchhoffs law
B. Lenz’s law
C. Ampere’s law
D. Faraday’s laws
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
A. less than that of disc but in opposite direction
B. equal to that of disc and in the same direction
C. equal to that of disc and in the opposite direction
D. less than that of disc and in the same direction
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
A. 2
B. 4
C. 6
D. 8
The materials are a bit inferior conductors of magnetic flux than air
The materials are a bit inferior conductors of magnetic flux than air
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. dielectric
he retentivity (a property) of material is useful for the construction of__________?
he retentivity (a property) of material is useful for the construction of__________?
A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
he retentivity (a property) of material is useful for the construction of_______________?
he retentivity (a property) of material is useful for the construction of_______________?
A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
A permanent magnet______________?
A permanent magnet______________?
A. attracts some substances and repels others
B. attracts all paramagnetic substances and repels others
C. attracts only ferromagnetic substances
D. attracts ferromagnetic substances and repels all others
The relative permeability of materials is not constant
The relative permeability of materials is not constant
A. diamagnetic
B. paramagnetic
C. ferromagnetic
D. insulating