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 187 At 300 At 18.75 At 30 At 187 At 300 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Indicate which of the following material does not retain magnetism permanently. Hardened steel None of the listed here Soft iron Stainless steel Hardened steel None of the listed here Soft iron Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The ability of a material to remain magnetized after removal of the magnetizing force is known as permeability retentivity reluctance hysteresis permeability retentivity reluctance hysteresis ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permanent magnet Attracts some substances and repels others Attracts ferromagnetic substances and repels all others Attracts only ferromagnetic substances Attracts all paramagnetic substances and repels others Attracts some substances and repels others Attracts ferromagnetic substances and repels all others Attracts only ferromagnetic substances Attracts all paramagnetic substances and repels others ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The initial permeability of an iron rod is The lowest permeability of the iron rod The highest permeability of the iron rod The permeability almost in non-magnetised state The permeability at the end of the iron rod The lowest permeability of the iron rod The highest permeability of the iron rod The permeability almost in non-magnetised state The permeability at the end of the iron rod ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Magnetism of a magnet can be destroyed by Hammering Heating By inductive action of another magnet All of the listed here Hammering Heating By inductive action of another magnet All of the listed here ANSWER DOWNLOAD EXAMIANS APP
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