Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 24 At 2,400 At 240 At 2.4 At 24 At 2,400 At 240 At 2.4 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200? 8 12 4 6 8 12 4 6 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? 200 At 150 At 300 At 100 At 200 At 150 At 300 At 100 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism An electromagnetic field exists only when there is current an increasing current voltage decreasing current current an increasing current voltage decreasing current 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 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 250 AT/m 0.25 AT/m 25 AT/m 2500 AT/m 250 AT/m 0.25 AT/m 25 AT/m ANSWER DOWNLOAD EXAMIANS APP
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