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? 150 At 200 At 100 At 300 At 150 At 200 At 100 At 300 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle will depend on the amount of e.m.f. applied will be zero will be infinite will depend on the radius of the circle will depend on the amount of e.m.f. applied will be zero will be infinite will depend on the radius of the circle ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetic materials exhibit the property of magnetisation because of spin of electrons orbital motion of electrons either of these spin of nucleus spin of electrons orbital motion of electrons either of these spin of nucleus ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The relative permeability is less than unity is case of Paramagnetic material Ferrits Diamagnetic material Ferromagnetic material Paramagnetic material Ferrits Diamagnetic material Ferromagnetic material 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? 2500 AT/m 0.25 AT/m 250 AT/m 25 AT/m 2500 AT/m 0.25 AT/m 250 AT/m 25 AT/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by Placing it inside a coil carrying current The use of permanent magnet Rubbing with another magnet Induction Placing it inside a coil carrying current The use of permanent magnet Rubbing with another magnet Induction ANSWER DOWNLOAD EXAMIANS APP
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