E234_W11 (Transformers)

The operating principal of Electrical Transformers is based on ________.

• Electrical Grounding

• Electrical Amplification

• Electromagnetic Induction

In order to maximize the flux linkages between coils, their windings are wound on ________.

• Wooden Core

• Iron Core

• Aluminum Core

The result of coupling of inductances via the magnetic fields as shown below is known as ________.

• Mutual Magnetism

• Mutual Voltage

• Mutual Inductance

When the secondary windings of a transformer has more turns than the primary windings, it is known as ________ transformer.

• Step-up

• Step-down

• Isolation

For a 2:1 step-down transformer, the amount of secondary current is ________ the primary current

• twice of

• same as

• half of

The rating of transformer is in ________.

• KW

• KVAR

• KVA