2.4 EM

1. Which of the following is the primary function of a transformer?

• 1. a) To convert AC power to DC power

• 1. b) To change the voltage level of an electrical signal

• 1. c) To store electrical energy

• 1. d) To generate mechanical motion

2. Which material is commonly used for the core of a transformer?

• 2. a) Copper

• 2. b) Aluminum

• 2. c) Iron

• 2. d) Silver

3. Which type of transformer has its primary and secondary windings wound around a common magnetic core?

• 3. a) Shell-type transformer

• 3. b) Core-type transformer

• 3. c) Autotransformer

• 3. d) Step-up transformer

4. What is the purpose of the laminated core in a transformer?

• 4. a) To increase the weight of the transformer

• 4. b) To provide mechanical support to the windings

• 4. c) To reduce eddy current losses

• 4. d) To enhance the cooling of the transformer

6. Which of the following is the most common type of transformer used in power distribution systems?

• 6. a) Autotransformer

• 6. b) Three-phase transformer

• 6. c) Isolation transformer

• 6. d) Step-down transformer