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
Magnetism and Electromagnetism Strength of an electromagnet can be increased by Increasing current supply Increasing the cross-sectional area All of the listed here Increasing the number of turns Increasing current supply Increasing the cross-sectional area All of the listed here Increasing the number of turns ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Substances which have permeability less than the permeability of free space are known as Diamagnetic material Paramagnetic material Ferro magnetic material Bipolar Diamagnetic material Paramagnetic material Ferro magnetic material Bipolar ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? 2,400 At 2.4 At 240 At 24 At 2,400 At 2.4 At 240 At 24 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The materials having low retentivity are suitable for making Weak magnet None of the listed here Permanent magnet Temporary Magnet Weak magnet None of the listed here Permanent magnet Temporary Magnet ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The materials are a bit inferior conductors of magnetic flux than air. None of the listed here Ferromagnetic Diamagnetic Dielectric None of the listed here Ferromagnetic Diamagnetic Dielectric ANSWER DOWNLOAD EXAMIANS APP
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