A. copper
B. aluminium
C. soft iron
D. brass
The commonly used material for shielding or screening magnetism is____________? Read More »
Magnetism and Electromagnetism A. Kirchhoffs law
B. Lenz’s law
C. Ampere’s law
D. Faraday’s laws
The Biot-savart’s law is a general modification of_______________? Read More »
Magnetism and Electromagnetism 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
A. 2
B. 4
C. 6
D. 8
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. dielectric
The materials are a bit inferior conductors of magnetic flux than air Read More »
Magnetism and Electromagnetism A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
he retentivity (a property) of material is useful for the construction of__________? Read More »
Magnetism and Electromagnetism A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
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
A permanent magnet______________? Read More »
Magnetism and Electromagnetism A. diamagnetic
B. paramagnetic
C. ferromagnetic
D. insulating
The relative permeability of materials is not constant Read More »
Magnetism and Electromagnetism A. M
B. M/2
C. 2 M
D. M/4
