Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the direction of the magnetic field reverses direction of the magnetic field remains unchanged magnetic field expands magnetic field collapses direction of the magnetic field reverses direction of the magnetic field remains unchanged magnetic field expands magnetic field collapses ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A magnetic field exists around Moving Charges Copper Aluminium Iron Moving Charges Copper Aluminium Iron ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The materials are a bit inferior conductors of magnetic flux than air. Ferromagnetic Dielectric Diamagnetic None of the listed here Ferromagnetic Dielectric Diamagnetic None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The change of cross-sectional area of conductor in magnetic field will affect reluctance of conductor None of these resistance of conductor both of the listed here reluctance of conductor None of these resistance of conductor both of the listed here 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? 12 4 8 6 12 4 8 6 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon Motion of the magnet Resistance of the coil Pole strength of the magnet Number of turns of the coil Motion of the magnet Resistance of the coil Pole strength of the magnet Number of turns of the coil ANSWER DOWNLOAD EXAMIANS APP
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