Transformer Losses: Core, Copper, and Efficiency…

Q: Which of the following is a core loss in a transformer?

Hysteresis loss — Hysteresis loss is a core loss caused by the reversing of the magnetic domains.

Q: What type of loss is primarily caused by current flowing through the transformer windings?

Copper loss — Copper loss (I²R loss) is due to the resistance of the windings.

Q: Core losses in a transformer are primarily dependent on:

Frequency and voltage — Core losses are mainly determined by the supply frequency and applied voltage.

Q: Copper losses in a transformer are also known as:

I²R losses — Copper losses follow the formula I²R where I is the current, and R is the resistance.

Q: What is the formula for calculating transformer efficiency?

(Output Power / Input Power) * 100 — Efficiency is the ratio of output power to input power, expressed as a percentage.

Q: Which loss is reduced by using laminated core construction?

Eddy current loss — Lamination reduces eddy currents, which are induced in the core by the changing flux.

Q: Where does the hysteresis loss occur in a transformer?

In the core — Hysteresis loss is a form of core loss and happens in the magnetic core.

Q: If the load on a transformer increases, which loss increases significantly?

Copper loss — Copper loss (I²R loss) is directly proportional to the square of the load current.

Q: What is the primary factor that determines the core loss?

Supply voltage and frequency — Core loss is mainly determined by the supply voltage and frequency.

Q: How can the efficiency of a transformer be improved?

Decreasing the copper losses — Reducing copper and core losses leads to increased efficiency.

Question 1 of 10

Which of the following is a core loss in a transformer?

Hysteresis loss is a core loss caused by the reversing of the magnetic domains.

Question 2 of 10

What type of loss is primarily caused by current flowing through the transformer windings?

Copper loss (I²R loss) is due to the resistance of the windings.

Question 3 of 10

Core losses in a transformer are primarily dependent on:

Core losses are mainly determined by the supply frequency and applied voltage.

Question 4 of 10

Copper losses in a transformer are also known as:

Copper losses follow the formula I²R where I is the current, and R is the resistance.

Question 5 of 10

What is the formula for calculating transformer efficiency?

Efficiency is the ratio of output power to input power, expressed as a percentage.

Question 6 of 10

Which loss is reduced by using laminated core construction?

Lamination reduces eddy currents, which are induced in the core by the changing flux.

Question 7 of 10

Where does the hysteresis loss occur in a transformer?

Hysteresis loss is a form of core loss and happens in the magnetic core.

Question 8 of 10

If the load on a transformer increases, which loss increases significantly?

Copper loss (I²R loss) is directly proportional to the square of the load current.

Question 9 of 10

What is the primary factor that determines the core loss?

Core loss is mainly determined by the supply voltage and frequency.

Question 10 of 10

How can the efficiency of a transformer be improved?

Reducing copper and core losses leads to increased efficiency.

Transformer Losses: Core, Copper, and Efficiency Quiz