Lesson 6: Electrical Components

Question 1

Which of the following is commonly used as a visual indicator?

A. LED

B. FET

C. Zener diode

D. Bipolar transistor

Answer 1

A. LED

Question 2

Which of the following can provide power gain?

A. Transformer

B. Transistor

C. Reactor

D. Resistor

Answer 2

B. Transistor

Question 3

What type of electrical component consists of conductive surfaces separated by an insulator?

A. Resistor

B. Potentiometer

C. Oscillator

D. Capacitor

Answer 3

D. Capacitor

Question 4

What electronic component allows current to flow in only one direction?

A. Resistor

B. Fuse

C. Diode

D. Driven element

Answer 4

C. Diode

Note:
In the forward direction, a minimum amount of voltage, called the voltage drop, is required to have the diode conduct current. Because different materials are used in diodes, voltage drop is lower in some diode types.

Question 5

What electrical component is typically constructed as a coil of wire?

A. Switch

B. Capacitor

C. Diode

D. Inductor

Answer 5

D. Inductor

Note:
Sometimes you will see the coil constructed from small copper tubing. Remember the “skin effect.” In AC circuits, the current flows on the outside of the conductor.

Question 6

Which is true about forward voltage drop in a diode?

A. It is lower in some diode types than in others

B. It is proportional to peak inverse voltage

C. It indicates that the diode is defective

D. It has no impact on the voltage delivered to the load

Answer 6

A. It is lower in some diode types than in others