Electrical Transformer Quiz

What is the primary function of a step-down transformer?

• To store electrical energy

• To convert AC to DC

• To reduce the voltage

• To increase the voltage

Explain the concept of turns ratio in a step-down transformer.

• The turns ratio is the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.

• The turns ratio is the ratio of the number of turns in the primary coil to the number of turns in the core.

• The turns ratio is the ratio of the number of turns in the secondary coil to the number of turns in the primary coil.

• The turns ratio is the ratio of the number of turns in the primary coil to the number of turns in the tertiary coil.

What is the voltage ratio of a step-down transformer?

• Depends on the transformer type

• Greater than 1

• Equal to 1

• Less than 1

How does a step-down transformer reduce voltage?

• By having more turns in the primary coil than in the secondary coil

• By increasing the number of turns in the secondary coil

• By using a larger primary coil

• By decreasing the resistance in the secondary coil

What are the typical applications of a step-down transformer?

• Telecommunication equipment

• Cooking and heating appliances

• Agricultural machinery

• Power distribution and electronic devices

Describe the construction of a step-down transformer.

• The primary coil has more turns than the secondary coil.

• The primary coil has fewer turns than the secondary coil.

• The primary coil is made of a material with higher resistance than the secondary coil.

• The primary coil is connected to a higher voltage source than the secondary coil.

What is the difference between primary and secondary winding in a step-down transformer?

• The primary winding is used for high voltage while the secondary winding is used for low voltage.

• The primary winding has more turns than the secondary winding.

• The primary winding has fewer turns than the secondary winding.

• The primary winding is made of copper while the secondary winding is made of aluminum.

Explain the working principle of a step-down transformer.

• It has no effect on the voltage between the primary and secondary coils.

• It increases the voltage from the primary coil to the secondary coil.

• It reduces the voltage from the primary coil to the secondary coil.

• It converts electrical energy into mechanical energy.

What is the formula to calculate the output voltage of a step-down transformer?

• V2 = V1 + N2

• V2 = V1 x N2

• V2 = V1/N2

• V2 = V1 - N2

Discuss the efficiency of a step-down transformer.

• Does not affect voltage or current

• Causes a decrease in voltage and decrease in current

• Inefficient in reducing voltage and increasing current

• Efficient in reducing voltage and increasing current