Electrical Transformers

If a transformer increases voltage, it is called a ......... transformer.

• step right

• step left

• step up

• step down

Induced voltage in primary and secondary winding depends on the following except for

• Resistor, R

• number of turns, N

• magnetic flux

• Frequency

A transformer is a device that changes the voltage of

• a direct current

• an alternating current

Which of the following does not change in a transformer?

• Voltage

• Current

• Power

• Frequency

The function of a transformer is to ...

• raise and lower the apparent power levels

• transfer DC voltage from the primary winding to the secondary winding

• increase or decrease A.C voltage or A.C current (Amps) levels

• transform mechanical energy into electrical energy

The transformer with 3 levels of output voltage two equals and one that is the double is also called...

• Center tap transformer

• Double tap transformer

• Single tap transformer

Is the metal used to build the coils of transformers

• Aluminum

• copper

• steel

The highest output voltage of a center tap transfomer with 10 V in one section is.

• 20 V

• 10 V

• 24 V

A transformer having turns ratio of 300 : 2400. What type of transformer is this?

• Step down transformer

• Ideal transformer

• Step up transformer

Transformer works on which of the following principle

• Lenz’s Law

• Ampere's Law

• Faraday's Law of Electromagenetic Induction

• Fleming's Law