2.2 EM

1. What is the main difference between a separately excited DC generator and a self-excited DC generator?

• 1. a) The separately excited generator has a higher efficiency.

• 1. b) The self-excited generator has a larger capacity.

• 1. c) The separately excited generator requires an external power source for excitation.

• 1. d) The self-excited generator operates at a higher voltage.

2. Which of the following equations represents the electromotive force (EMF) equation for a DC generator?

• 2. a) V = IR

• 2. b) P = IV

• 2. c) E = IR

• 2. d) E = V - IR

3. What is the purpose of the field winding in a DC generator?

• 3. a) To convert mechanical energy into electrical energy

• 3. b) To generate the main output current

• 3. c) To establish the magnetic field in the generator

• 3. d) To regulate the voltage output of the generator

6. Which of the following types of DC generators requires a separate excitation source?

• 6. a) Series generator

• 6. b) Shunt generator

• 6. c) Compound generator

• 6. d) Separately excited generator

1. What does the term "EMF" stand for in relation to generators?

• 1. a) Electric Motor Function

• 1. b) Electromotive Force

• 1. c) Electronic Magnetic Field

• 1. d) Energy Management Formula