Magnetism and Electromagnetism What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it? 18.75 At 30 At 300 At 187 At 18.75 At 30 At 300 At 187 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The induced voltage across a stationary conductor in a stationary magnetic field is reversed in polarity increased decreased zero reversed in polarity increased decreased zero ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Increases the flux density Reverses the flux lines Causes no change in flux density Decreases the flux density Increases the flux density Reverses the flux lines Causes no change in flux density Decreases the flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Susceptibility is positive for diamagnetic substances None of these non-magnetic substances ferromagnetic substances diamagnetic substances None of these non-magnetic substances ferromagnetic substances ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by The use of permanent magnet Rubbing with another magnet Induction Placing it inside a coil carrying current The use of permanent magnet Rubbing with another magnet Induction Placing it inside a coil carrying current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The change of cross-sectional area of conductor in magnetic field will affect reluctance of conductor resistance of conductor None of these both of the listed here reluctance of conductor resistance of conductor None of these both of the listed here ANSWER DOWNLOAD EXAMIANS APP
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