electrical 2 inportant questions

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

• field strength
• Magnetic flux
• Magnetic strength
• flux density

The unit of MMF is

• ampere-turn
• hendry
• weber
• farad

unit of magnetic field strength is

• ampere-turn
• tesla
• wb/m2
• ampere-turn per meter

The amount of electric field passing through a surface is called

• electric field
• electric flux
• electrostatics
• 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

• flux density
• premitivity
• electric field
• none

current transformer are used to measure

• current
• power
• voltage
• None

Transformer works on the principle o

• flemings right hand rule
• flemings left 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/star
• star/delta
• None