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)? 360 180 90 270 360 180 90 270 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The initial permeability of an iron rod is The permeability at the end of the iron rod The highest permeability of the iron rod The permeability almost in non-magnetised state The lowest permeability of the iron rod The permeability at the end of the iron rod The highest permeability of the iron rod The permeability almost in non-magnetised state The lowest permeability of the iron rod ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Which of the following is the unit of magnetic flux density? Tesla None of the listed here Lumens Weber Tesla None of the listed here Lumens Weber ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage remains unchanged reverses polarity decreases increases remains unchanged reverses polarity decreases increases ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism The ability of a material to remain magnetized after removal of the magnetizing force is known as retentivity hysteresis reluctance permeability retentivity hysteresis reluctance permeability ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil? Increases Remains same First increases and then decreases depending on the depth of iron in¬sertion Decreases Increases Remains same First increases and then decreases depending on the depth of iron in¬sertion Decreases ANSWER DOWNLOAD EXAMIANS APP
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