Magnetism and Electromagnetism Which of the following is expected to have the maximum permeability ? Copper Brass Zinc Ebolite Copper Brass Zinc Ebolite ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wirewound core, an increase in current through the coil causes no change in flux density decreases the flux density increases the flux density reverses the flux lines causes no change in flux density decreases the flux density increases the flux density reverses the flux lines 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 Number of turns of the coil Pole strength of the magnet Motion of the magnet Resistance of the coil Number of turns of the coil Pole strength of the magnet Motion of the magnet Resistance of the coil ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A keeper is used to Amplify flux Provide a closed path for flux Change the direction of magnetic lines Restore lost flux Amplify flux Provide a closed path for flux Change the direction of magnetic lines Restore lost flux ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)? 180 360 270 90 180 360 270 90 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The magnetic reluctance of a material 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 Increases with increasing cross-sec-tional area of material Any of the listed here ANSWER DOWNLOAD EXAMIANS APP
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