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? 200 At 300 At 100 At 150 At 200 At 300 At 100 At 150 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism An electromagnetic field exists only when there is an increasing current decreasing current current voltage an increasing current decreasing current current voltage ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In the left hand rule, forefinger always represents current magnetic field Voltage direction of force on the conductor current magnetic field Voltage direction of force on the conductor ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Paramagnetic materials have relative permeability slightly more than unity slightly less than unity equal to that ferromagnetic mate rials equal to unity slightly more than unity slightly less than unity equal to that ferromagnetic mate rials equal to unity 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 Pole strength of the magnet Number of turns of the coil Resistance of the coil Motion of the magnet Pole strength of the magnet Number of turns of the coil Resistance of the coil Motion of the magnet ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Main causes of noisy solenoid are uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts None of these strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force Both of the listed here uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts None of these strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force Both of the listed here ANSWER DOWNLOAD EXAMIANS APP
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