electrical 2nd intermediate questions 1

The group of force lines going from the N,pole to the S,pole of a magnetis called as

• Magnetic strength

• Magnetic flux

• flux density

• field strength

The unit of MMF is

• weber

• hendry

• farad

• ampere-turn

unit of magnetic field strength is

• ampere-turn

• wb/m2

• tesla

• ampere-turn per meter

The amount of electric field passing through a surface is called

• electric field

• electrostatics

• electric flux

• none

if current changes in coil 1, an EMF is induced in coil 2

• mutual inductance

• self inductance

• dunamically induced EMF

• none

The ratio of electric displacement vector(D) in a dielectric medium to the applied electric field strength

• electric field

• flux density

• premitivity

• none

current transformer are used to measure

• voltage

• current

• power

• none

Transformer works on the principle of

• flemings left hand rule

• flemings right hand rule

• mutual induction

• none

The dissimilar ends of three phase winding are joined together is called

• delta/star

• star/delta

• delta

• star

The similar ends of 3 coils are joined together at point N is called

• delta/star

• star/delta

• star/star

• none