5) What is the name of effect of changing current in one coil, induces EMF in nearby coil?

Coupling

Induction

Self induction

Mutual induction

Answer is:

Mutual induction

Weber / metre²

Weber / metre

Ampere turns / Weber

Ampere turns / metre²

Answer is:

Explanation:

Reluctance is magnetomotive force per unit flux,
So unit of reluctance = unit of MMF / unit of magnetic flux = A/Wb. = Ampere turns / Weber

Induction method

Single touch method

Double touch method

Divided touch method

Answer is:

Steel 97% and Silicon 3%

Steel 95% and Silicon 5%

Steel 93% and Silicon 7%

Steel 90% and Silicon 10%

Answer is:

Reduce copper loss

Reduce hysteresis loss

Reduce mechanical loss

Reduce eddy current loss

Answer is: