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? 0.25 AT/m 2500 AT/m 25 AT/m 250 AT/m 0.25 AT/m 2500 AT/m 25 AT/m 250 AT/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ? 63.38 N/Wb 6338 N/Wb 63380 N/Wb 633.8 N/Wb 63.38 N/Wb 6338 N/Wb 63380 N/Wb 633.8 N/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The unit for reluctance is Wb At/Wb tesla At/m Wb At/Wb tesla At/m ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the mmf of a wire with 8 turns carrying three amperes of current? 24 AT 240 AT 0.24 AT 2.4 AT 24 AT 240 AT 0.24 AT 2.4 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Materials subjected to rapid reversal of magnetism should have High permeability and low hysteresis loss High co-ercivity and low density High co-ercivity and high retentivity Large area of B-H loop High permeability and low hysteresis loss High co-ercivity and low density High co-ercivity and high retentivity Large area of B-H loop ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Temporary magnets are used in All of the listed here Motors Loud speakers Generators All of the listed here Motors Loud speakers Generators ANSWER DOWNLOAD EXAMIANS APP
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