Transformer Fundamentals Quiz

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Questions and Answers

What is the primary function of a transformer?

To transform electric power between circuits without changing frequency (correct)
To amplify the voltage in a circuit
To convert electrical energy to mechanical energy
To change the frequency of the current in a circuit

Which of the following statements is true regarding the primary and secondary windings of a transformer?

Both windings can be connected to external loads simultaneously
The primary winding is always of higher voltage than the secondary winding
The secondary winding is directly connected to the AC supply
The primary winding receives electrical energy, while the secondary winding delivers it (correct)

What principle underlies the operation of a transformer?

Electromagnetic induction (correct)
Resistive heating
Static electricity generation
Capacitive coupling between circuits

In a transformer, what happens to the current when the voltage is raised?

<p>The current decreases as the voltage increases (B)</p> Signup and view all the answers

Which component in a transformer links the two coils magnetically?

<p>A laminated core with low reluctance (D)</p> Signup and view all the answers

Flashcards

Transformer

A device that transfers electric power from one circuit to another without changing the frequency.

Primary winding

The coil connected to the AC supply, where energy is fed in.

Secondary winding

The coil connected to the load, from which energy is drawn out.

Mutual induction

The phenomenon that allows transformers to work; two coils linked by a common magnetic flux.

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Voltage and current transformation

The voltage in a circuit is raised or lowered while the current changes inversely proportional.

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Study Notes

Transformer Fundamentals

Transformers are static devices that convert electrical power in one circuit to power of the same frequency in another circuit.
They change voltage and current proportionally: increasing voltage decreases current, and vice versa.
The core principle is mutual induction between linked circuits, creating a common magnetic flux.
A basic transformer has two electrically-separated but magnetically-linked coils.
The coils have high mutual inductance.
An alternating current in the primary coil creates a changing magnetic flux in the laminated core.
This flux induces a voltage in the secondary coil (Faraday's Law).
Closing the secondary circuit allows current flow, transferring energy through magnetic induction.
The primary coil receives power from the AC source.
The secondary coil delivers the transformed power.

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Description

Test your knowledge on the principles of transformers, a vital component in electrical engineering. This quiz covers topics such as mutual induction, voltage transformation, and the basic structure of transformers. Perfect for students and professionals looking to reinforce their understanding of electrical power conversion.