Magnetism and Electromagnetism The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is 1,000 V 31.25 V 3,125 V 2,000 V 1,000 V 31.25 V 3,125 V 2,000 V ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permeable substance is one Which is a strong magnet Through which the magnetic lines of force can pass very easily Which is a bad conductor Which is a good conductor Which is a strong magnet Through which the magnetic lines of force can pass very easily Which is a bad conductor Which is a good conductor 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? 3 AT 300 AT 0.3 AT 30 AT 3 AT 300 AT 0.3 AT 30 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The most effective and quickest may of making a magnet from soft iron is by Rubbing with another magnet The use of permanent magnet Induction Placing it inside a coil carrying current Rubbing with another magnet The use of permanent magnet Induction Placing it inside a coil carrying current ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 240 At 2,400 At 24 At 2.4 At 240 At 2,400 At 24 At 2.4 At 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 co-ercivity and low density High permeability and low hysteresis loss Large area of B-H loop High co-ercivity and high retentivity High co-ercivity and low density High permeability and low hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
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