Magnetism and Electromagnetism For which of the following materials the saturation value is the highest? Paramagnetic materials Diamagnetic materials Ferrites Ferromagnetic materials Paramagnetic materials Diamagnetic materials Ferrites Ferromagnetic materials ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it? 0.3 AT 30 AT 300 AT 3 AT 0.3 AT 30 AT 300 AT 3 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Core of an electromagnet should have Low coercivity High susceptibility 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 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 Be excessive Increase Decrease Remain Constant Be excessive Increase Decrease Remain Constant ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Magnetising steel is normals difficult because it has high specific gravity it corrodes easily it has high permeability it has low permeability it has high specific gravity it corrodes easily it has high permeability it has low permeability ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 2.4 At 240 At 24 At 2,400 At 2.4 At 240 At 24 At 2,400 At ANSWER DOWNLOAD EXAMIANS APP
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