Magnetism and Electromagnetism When a solenoid is activated, the force that moves the plunger is an electromagnetic field varying voltage a permanent magnetic field a steady current an electromagnetic field varying voltage a permanent magnetic field a steady current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Main causes of noisy solenoid are Both of the listed here uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force None of these Both of the listed here uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force None of these ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The uniform magnetic field is None of the listed here The field in which all lines of magnetic flux are parallel and equidistant The field of a single conductor The field of a set of parallel conductors None of the listed here The field in which all lines of magnetic flux are parallel and equidistant The field of a single conductor The field of a set of parallel conductors ANSWER DOWNLOAD EXAMIANS APP
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 2.4 N 24 N 240 N 0.24 N 2.4 N 24 N 240 N 0.24 N ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In a simple magnetic field the strength of magnet flux is constant and has same value in energy part of the magnetic field increases continuously from initial value to final value first increases and then decreases till it becomes zero decreases continuously from initial value to final value is constant and has same value in energy part of the magnetic field increases continuously from initial value to final value first increases and then decreases till it becomes zero decreases continuously from initial value to final value ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wire-wound core, an increase in current through the coil Reverses the flux lines 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 ANSWER DOWNLOAD EXAMIANS APP
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