Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the magnetic field collapses magnetic field expands direction of the magnetic field remains unchanged direction of the magnetic field reverses magnetic field collapses magnetic field expands direction of the magnetic field remains unchanged direction of the magnetic field reverses ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetic reluctance of a material Increases with increasing cross-sec-tional area of material Any of the listed here Decreases with increasing cross sectional area of material Does not vary with increasing cross-sectional area of material Increases with increasing cross-sec-tional area of material Any of the listed here Decreases with increasing cross sectional area of material Does not vary with increasing cross-sectional area of material ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The direction of magnetic lines of force is From one end of the magnet to another None of the listed here From north pole to south pole From south pole to north pole From one end of the magnet to another None of the listed here From north pole to south pole From south pole to north pole 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? 3 AT 300 AT 30 AT 0.3 AT 3 AT 300 AT 30 AT 0.3 AT ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will Increases Remain same Decreases None of the listed here Increases Remain same Decreases None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Susceptibility is positive for non-magnetic substances ferromagnetic substances None of these diamagnetic substances non-magnetic substances ferromagnetic substances None of these diamagnetic substances ANSWER DOWNLOAD EXAMIANS APP
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