Magnetism and Electromagnetism When a solenoid is activated, the force that moves the plunger is varying voltage a permanent magnetic field an electromagnetic field a steady current varying voltage a permanent magnetic field an electromagnetic field a steady current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will Decrease Be excessive Increase Remain Constant Decrease Be excessive Increase Remain Constant ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The ability of a material to remain magnetized after removal of the magnetizing force is known as reluctance permeability retentivity hysteresis reluctance permeability retentivity hysteresis ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetomotive force is The flow of an electric current The passage of magnetic field through an exciting coil The sum of all currents embraced by one line of magnetic field The voltage across the two ends of exciting coil The flow of an electric current The passage of magnetic field through an exciting coil The sum of all currents embraced by one line of magnetic field The voltage across the two ends of exciting coil ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Materials subjected to rapid reversal of magnetism should have Large area of B-H loop High co-ercivity and high retentivity High permeability and low hysteresis loss High co-ercivity and low density Large area of B-H loop High co-ercivity and high retentivity High permeability and low hysteresis loss High co-ercivity and low density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For which of the following materials the net magnetic moment should be zero? ferrimagnetic materials diamagnetic materials antiferrimagnetic materials antiferromagnetic materials ferrimagnetic materials diamagnetic materials antiferrimagnetic materials antiferromagnetic materials ANSWER DOWNLOAD EXAMIANS APP
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