DAY 3 Resistors Lecture

Question 1

Used in electrical circuits to control the amount of current flow by converting electrical energy into heat

Answer 1

Resistors

Question 2

One _____ of resistance will allow one Amp of current to pass when one Volt of pressure is applied.

Answer 2

Ohm

Question 3

There are 2 main types of Resistors:

Answer 3

Fixed Resistors

Variable Resistors

Question 4

Resistive value is ______, it ______ be varied/changed.

Answer 4

answer;
Fixed

answer;
cannot

Question 5

Most common types

Composition Type - used to control small amount of current (2 main types)

Answer 5

Carbon Composition Type - made of compressed graphite

2. Film Composition Type:

Carbon-film – thin coating of carbon around an insulator

Metal film – Metal film wrapped around a ceramic core

Question 6

Resistor 1st band represents

Answer 6

1st significant figure in ohmic value

Question 7

Resistor 2nd band represents

Answer 7

2nd band 2nd significant figure

Question 8

Resistor 3rd band represents

Answer 8

Multiplier (number of zeros)

Question 9

Resistor 4th band represents

Answer 9

Tolerance (in %)

gold is plus or minus 5%

silver plus or minus 10%

if no fourth color , plus or minus 20%

Question 10

The band colored black has a value of

Answer 10

0

Question 11

The band colored brown has a value of

Answer 11

1

Question 12

The band colored Red has a value of

Answer 12

2

Question 13

The band colored Orange has a value of

Answer 13

3

Question 14

The band colored Yellow has a value of

Answer 14

4

Question 15

The band colored Green has a value of

Answer 15

5

Question 16

The band colored Blue has a value of

Answer 16

6

Question 17

The band colored Violet has a value of

Answer 17

7

Question 18

The band colored Gray has a value of

Answer 18

8

Question 19

The band colored White has a value of

Answer 19

9

Question 20

The 4th band having no color has a value of

Answer 20

+-20%

Question 21

The 4th band colored Silver has a value of

Answer 21

+-10%

Question 22

The 4th band colored Gold has a value of

Answer 22

+-5%

Question 23

If a resistor is less than 10 ohms

Use gold or silver multiplier

Answer 23

Gold multiply by .1

Silver multiply by .01

Question 24

1. Varies the current
2. Cockpit lighting
3. Has two terminals

Answer 24

Rheostat

Question 25

1. Changes the amount of voltage in a circuit
2. Used as a voltage divider
3. Three terminals
4. Connectors are usually soldered because potentiometer action is dependent on resistance and the resistance must be kept at a bare minimum

Answer 25

Potentiometer