transformers electronics question and answers -Page 4

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Transformers problems

1.

The reflected resistance is ___ as seen by the source in the given circu.
Options
A. 150 Ω
B. 300 Ω
C. 600 Ω
D. 2.4 kΩ

Correct Answer: 2.4 kΩ

2. To ensure a high coefficient of coupling, all fixed transformers are usually wound on a(n) _____________.
Options
A. EI core
B. iron core
C. common core
D. CI core

Correct Answer: common core

3. A(n) _____ transformer is usually used for audio or power applications.
Options
A. iron-core
B. air-core
C. ferrite-core
D. All of the above

Correct Answer: iron-core

4.

The voltage V₂ is _____ in the given circuit.
Options
A. 36.7 V
B. 73.3 V
C. 110 V
D. 220 V

Correct Answer: 36.7 V

5. A(n) ___ is sometimes constructed as a variable transformer.
Options
A. autotransformer
B. center-tapped transformer
C. multiple-tap transformer
D. multiple-winding transformer

Correct Answer: autotransformer

First 2 3 4

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