Worksheet 2-Resistors and Resistance

Question 1

Draw a symbol for a standard resistor.

Answer 1

Question 2

Describe the ways a resistor can be identified.

Answer 2

By a number reference to the manufacturer, by a set of color bands and by direct measurement.

Question 3

What are some types of variable resistors?

Answer 3

Rheostat, potentiometer, and a tapped resistor.

Question 4

What is/are the purpose(s) of a resistor in a circuit?

Answer 4

A resistor is designed to impede the flow of current in a circuit in two ways:

1) By slowing the overall current in a series circuit.
2) By providing biasing for voltage in parallel branches.

Question 5

In the four color band system of resistor identification, what does the third color band represent?

Answer 5

This is the multiplier of the number represented by the first two color bands while the third color is the multiplier by 10 of the first two numbers.

Question 6

Which resistors cannot apply to Ohm’s Law?

Answer 6

Ohm’s law cannot apply to resistors that change resistance based on heat or light conditions.

Question 7

What is meant by the term “tolerances” as it refers to the fourth color band on a resistor?

Answer 7

This is the percentage of resistance value that any resistor can maintain through a range of current. For example, a 1000 Ohm resistor with a silver band can be expected to maintain its value ± 100 ohms or 10%.

Question 8

Determine the value of this resistor:

Black
Green
Black
Gold

Answer 8

5 ohms ± 5%

Question 9

Determine the value of this resistor:

Blue
Red
Orange
Silver

Answer 9

62K ohms / 62,000 ohms ±10%

Question 10

Determine the value of this resistor:

Brown
Brown
Black
NC

Answer 10

11 ohms ±20%

Question 11

Determine the value of this resistor:

White
Black
Yellow
Silver

Answer 11

900,000 ohms ±10%

Question 12

How can resistor wattage capability be determined by looking at it?

Answer 12

The ability for a resistor to withstand more or less wattage based on the physical size or diameter of the resistor.