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? 100 At 300 At 150 At 200 At 100 At 300 At 150 At 200 At 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 ? 6338 N/Wb 63380 N/Wb 63.38 N/Wb 633.8 N/Wb 6338 N/Wb 63380 N/Wb 63.38 N/Wb 633.8 N/Wb ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The initial permeability of an iron rod is The highest permeability of the iron rod The permeability almost in non-magnetised state The permeability at the end of the iron rod The lowest permeability of the iron rod The highest permeability of the iron rod The permeability almost in non-magnetised state The permeability at the end of the iron rod The lowest permeability of the iron rod ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the magnetic field expands magnetic field collapses direction of the magnetic field remains unchanged direction of the magnetic field reverses magnetic field expands magnetic field collapses direction of the magnetic field remains unchanged direction of the magnetic field reverses ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When an iron piece is placed in a magnetic field the magnetic lines of force will bend away from their usual paths in order to pass through the piece the magnetic field will not be affected the iron piece will break the magnetic lines of force will bend away from their usual paths in order to go away from the piece the magnetic lines of force will bend away from their usual paths in order to pass through the piece the magnetic field will not be affected the iron piece will break the magnetic lines of force will bend away from their usual paths in order to go away from the piece ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The susceptibility of paramagnetic materials generally lies between 1CT3 and 1CT7 KT4 and KT8 KT3 and 1CT6 10"2 and KT5 1CT3 and 1CT7 KT4 and KT8 KT3 and 1CT6 10"2 and KT5 ANSWER DOWNLOAD EXAMIANS APP
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