Magnetism and Electromagnetism A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be 24 N 2.4 N 240 N 0.24 N 24 N 2.4 N 240 N 0.24 N ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Decreases the flux density Reverses the flux lines Increases the flux density Causes no change in flux density Decreases the flux density Reverses the flux lines Increases the flux density Causes no change in flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon Motion of the magnet Resistance of the coil Number of turns of the coil Pole strength of the magnet Motion of the magnet Resistance of the coil Number of turns of the coil Pole strength of the magnet ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The induced voltage across a stationary conductor in a stationary magnetic field is increased zero reversed in polarity decreased increased zero reversed in polarity decreased ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Paramagnetic materials have relative permeability slightly less than unity equal to unity equal to that ferromagnetic mate rials slightly more than unity slightly less than unity equal to unity equal to that ferromagnetic mate rials slightly more than unity ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetomotive force is The voltage across the two ends of exciting coil The passage of magnetic field through an exciting coil The flow of an electric current The sum of all currents embraced by one line of magnetic field The voltage across the two ends of exciting coil The passage of magnetic field through an exciting coil The flow of an electric current The sum of all currents embraced by one line of magnetic field ANSWER DOWNLOAD EXAMIANS APP
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