Magnetism and Electromagnetism A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ? 63380 N/Wb 6338 N/Wb 63.38 N/Wb 633.8 N/Wb 63380 N/Wb 6338 N/Wb 63.38 N/Wb 633.8 N/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The ability of a material to remain magnetized after removal of the magnetizing force is known as hysteresis retentivity reluctance permeability hysteresis retentivity reluctance permeability ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit of flux is the same as that of Permanance Pole strength Resistance Reluctance Permanance Pole strength Resistance Reluctance ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 24 At 240 At 2.4 At 2,400 At 24 At 240 At 2.4 At 2,400 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetic reluctance of a material Does not vary with increasing cross-sectional area of material Any of the listed here Increases with increasing cross-sec-tional area of material Decreases with increasing cross sectional area of material Does not vary with increasing cross-sectional area of material Any of the listed here Increases with increasing cross-sec-tional area of material Decreases with increasing cross sectional area of material ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Susceptibility is positive for ferromagnetic substances diamagnetic substances None of these non-magnetic substances ferromagnetic substances diamagnetic substances None of these non-magnetic substances ANSWER DOWNLOAD EXAMIANS APP
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