Magnetism and Electromagnetism What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it? 30 AT 300 AT 0.3 AT 3 AT 30 AT 300 AT 0.3 AT 3 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When an iron piece is placed in a magnetic field the magnetic lines of force will bend away from their usual paths in order to pass through the piece the iron piece will break the magnetic lines of force will bend away from their usual paths in order to go away from the piece the magnetic field will not be affected the magnetic lines of force will bend away from their usual paths in order to pass through the piece the iron piece will break the magnetic lines of force will bend away from their usual paths in order to go away from the piece the magnetic field will not be affected ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Increases the flux density Decreases the flux density Causes no change in flux density Reverses the flux lines Increases the flux density Decreases the flux density Causes no change in flux density Reverses the flux lines ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)? 90 360 180 270 90 360 180 270 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The relative permeability is less than unity is case of Paramagnetic material Diamagnetic material Ferromagnetic material Ferrits Paramagnetic material Diamagnetic material Ferromagnetic material Ferrits ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage reverses polarity decreases remains unchanged increases reverses polarity decreases remains unchanged increases ANSWER DOWNLOAD EXAMIANS APP
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