Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 2.4 At 24 At 2,400 At 240 At 2.4 At 24 At 2,400 At 240 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength? 25 AT/m 0.25 AT/m 2500 AT/m 250 AT/m 25 AT/m 0.25 AT/m 2500 AT/m 250 AT/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Degaussing is the process of Demagnetising metallic parts Removal of magnetic impurities Removing gases from the materials Remagnetising metallic parts Demagnetising metallic parts Removal of magnetic impurities Removing gases from the materials Remagnetising metallic parts ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The initial permeability of an iron rod is The highest permeability of the iron rod The permeability at the end of the iron rod The permeability almost in non-magnetised state The lowest permeability of the iron rod The highest permeability of the iron rod The permeability at the end of the iron rod The permeability almost in non-magnetised state The lowest permeability of the iron rod ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Core of an electromagnet should have Both low coercivity and high susceptibility None of the listed here Low coercivity High susceptibility Both low coercivity and high susceptibility None of the listed here Low coercivity High susceptibility ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The left hand rule correlates to Magnetic field, electric field and direction of force on a conductor Self induction, mutual induction and direction of force on a conductor Current, induced e.m.f. and direction of force on a conductor Current, magnetic field and direction of force on a conductor Magnetic field, electric field and direction of force on a conductor Self induction, mutual induction and direction of force on a conductor Current, induced e.m.f. and direction of force on a conductor Current, magnetic field and direction of force on a conductor ANSWER DOWNLOAD EXAMIANS APP
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