Magnetism and Electromagnetism When the current through the coil of an electromagnet reverses, the 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 magnetic field expands ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The induced voltage across a stationary conductor in a stationary magnetic field is zero increased reversed in polarity decreased zero increased reversed in polarity decreased ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current? 2,400 At 24 At 2.4 At 240 At 2,400 At 24 At 2.4 At 240 At ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density increases decreases remains the same doubles increases decreases remains the same doubles 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? 6 4 12 8 6 4 12 8 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Unit for quantity of electricity is Ampere Joule Ampere-hour Coulomb Ampere Joule Ampere-hour Coulomb ANSWER DOWNLOAD EXAMIANS APP
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