Electrical Engineering Flashcards
What is the primary function of a transformer?
To transfer electrical energy between two or more circuits through electromagnetic induction.
What are the main components of a transformer?
- Primary winding
- Secondary winding
- Core
What does the primary winding do in a transformer?
It receives the input voltage and creates a magnetic field.
What is the role of the core in a transformer?
To provide a path for the magnetic flux and enhance the efficiency of energy transfer.
Fill in the blank: The ratio of the number of turns in the primary winding to the number of turns in the secondary winding is known as the _______.
[turns ratio]
What happens to voltage when the turns ratio is greater than 1?
The voltage is stepped down.
What happens to voltage when the turns ratio is less than 1?
The voltage is stepped up.
True or False: A transformer can operate with direct current (DC).
False
What type of current is required for a transformer to function?
Alternating current (AC)
What is the principle behind the operation of a transformer?
Electromagnetic induction
Fill in the blank: The efficiency of a transformer is determined by the ratio of output power to input power, expressed as a _______.
[percentage]
What factors can affect the efficiency of a transformer?
- Copper losses
- Iron losses
- Stray losses
What are copper losses in a transformer?
Losses due to the resistance of the wire in the windings.
What are iron losses in a transformer?
Losses due to hysteresis and eddy currents in the core.
True or False: Transformers can be used to convert AC to DC.
False
