Resistors

Question 1

What are the two functions of a resistor

Answer 1

Limit current flow

Create a voltage divider

Question 2

Three types of fixed resistors

Answer 2

Carbon film
Metal glaze
Wire wound

Question 3

What is a fixed resistor

Answer 3

Has only one ohmic value

Cannot be changed or adjusted

Question 4

What is a carbon film resistor (3)

Answer 4

Ceramic rod coated with a film of carbon
Inexpensive
Can have a high tolerance rating

Question 5

What is a metal glaze resistor (3)

Answer 5

Made by combining metals with glass

Compound is applied to a ceramic base

Resistance is determined by how much metal is used in the compound

Question 6

What is a metal film resistor

Answer 6

Constructed by applying a film of metal to a ceramic rod in a vacuum

Resistance is determined by the type of metal used a thickness of metal

Question 7

What is a wire wound resistor

Answer 7

Made by winding a piece of resistor with a wire around a ceramic core

Resistance is determined by wire material, diameter and length

Used when high power is needed

Question 8

Wire wound have what effect

Answer 8

Chimney effect for cooling

Question 9

Colour code

Answer 9

Black
Brown
Red
Orange
Yellow
Green
Blue
Violate
Gray
White