Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 240 At 24 At 2.4 At 2,400 At 240 At 24 At 2.4 At 2,400 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density doubles remains the same decreases increases doubles remains the same decreases increases ANSWER DOWNLOAD EXAMIANS APP
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 ? 6338 N/Wb 63380 N/Wb 63.38 N/Wb 633.8 N/Wb 6338 N/Wb 63380 N/Wb 63.38 N/Wb 633.8 N/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Ferrites are a sub-group of Paramagnetic material Non-magnetic materials Ferri-magnetic material Ferro magnetic material Paramagnetic material Non-magnetic materials Ferri-magnetic material Ferro magnetic material ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In a simple magnetic field the strength of magnet flux first increases and then decreases till it becomes zero is constant and has same value in energy part of the magnetic field decreases continuously from initial value to final value increases continuously from initial value to final value first increases and then decreases till it becomes zero is constant and has same value in energy part of the magnetic field decreases continuously from initial value to final value increases continuously from initial value to final value ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The Biotsavart's law is a general modification of Kirchhoff's law Lenz's law Faraday's laws Ampere's law Kirchhoff's law Lenz's law Faraday's laws Ampere's law ANSWER DOWNLOAD EXAMIANS APP
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