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 Decreases None of the listed here Increases Remain same TRUE ANSWER : ? YOUR ANSWER : ?
Main causes of noisy solenoid are uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts Both of the listed here strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force None of these TRUE ANSWER : ? YOUR ANSWER : ?
The direction of a magnetic field within a magnet is from north to south front to back back to front from south to north TRUE ANSWER : ? YOUR ANSWER : ?
If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage Decrease None of the listed here Increase Is zero TRUE ANSWER : ? YOUR ANSWER : ?
If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage increases remains unchanged decreases reverses polarity TRUE ANSWER : ? YOUR ANSWER : ?
For a given wirewound core, an increase in current through the coil reverses the flux lines decreases the flux density causes no change in flux density increases the flux density TRUE ANSWER : ? YOUR ANSWER : ?
Reciprocal of permeability is Reluctivity Permeability conductance Susceptibility TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following type of materials are not very important for engineering applications? Paramagnetic material Ferro magnetic material None of the listed here Diamagnetic material TRUE ANSWER : ? YOUR ANSWER : ?
Ferrites are a sub-group of Non-magnetic materials Paramagnetic material Ferro magnetic material Ferri-magnetic material TRUE ANSWER : ? YOUR ANSWER : ?
The initial permeability of an iron rod is The highest permeability of the iron rod The permeability at the end of the iron rod The permeability almost in non-magnetised state The lowest permeability of the iron rod TRUE ANSWER : ? YOUR ANSWER : ?