Transformer MCQs Part 26

Transformer MCQs Part 26

In a transformer, the amount of copper in primary as compared to secondary is

In a transformer, the amount of copper in primary as compared to secondary is:

1. Greater
2. Smaller
3. Almost same
4. None of these

Correct answer: 3. Almost same

Explanation: The number of turns on primary and secondary windings of a transformer depend on their respective voltages, the high voltage winding has far greater number of turns as compared to low voltage winding, whereas the current in high voltage winding is very smaller, thus enabling to use a smaller size conductor. As a result of this, the amount of copper in primary and secondary is almost same.

Also see: What is a Linear Variable Differential Transformer

For distribution transformer, the all-day efficiency is ____________ commercial efficiency

For distribution transformer, the all-day efficiency is ____________ commercial efficiency:

1. Less than
2. More than
3. Same as
4. None of these

Correct answer: 1. Less than

The all-day efficiency of transformer is also known as its

The all-day efficiency of transformer is also known as its:

1. Power efficiency
2. Energy efficiency
3. Current efficiency
4. None of these

Correct answer: 2. Energy efficiency

The inductive reactance of transformer depends on

The inductive reactance of transformer depends on:

1. EMF
2. MMF
3. Leakage flux
4. Magnetic flux

Correct answer: 3. Leakage flux

The basic function of a transformer is to

The basic function of a transformer is to

1. Convert ac to dc voltages
2. Convert dc to ac voltages
3. Step up or step down the ac voltages and currents
4. Step up or step down the dc voltages and currents

Correct answer: 3. Step up or step down the ac voltages and currents

See Complete List of Transformer MCQs here.