Electrical Quantities and Ohm's Law

Question 1

Ampere

Answer 1

unit of measure for rate of current flow
1 A = 1 C/s

Question 2

British Thermal Unit (BTU)

Answer 2

amount of heat required to raise 1 pound of water 1 degree F

Question 3

Complete Path

Answer 3

path that exists in a circuit when it can be traced from one terminal of a power source to another

Question 4

Conventional Current Flow Theory

Answer 4

theory that considers current to flow from positive to negative

Question 5

Coulomb

Answer 5

quantity of electrons equal to 6.25 x 10E18

Question 6

Electromotive Force (EMF)

Answer 6

electrical pressure
the fore that pushes electrons through a wire

Question 7

EMF aka

Answer 7

voltage

Question 8

Electron Flow Theory

Answer 8

electricity flows from negative to positive

Question 9

Grounding conductor

Answer 9

conductor that is used to force a piece of equipment to exist at ground potential; usually green in colour

Question 10

Horsepower

Answer 10

measure of power for electrical and mechanical devices

Question 11

1 hp equals how many watts

Answer 11

746 W

Question 12

1 hp equals how many ft-lbs/s

Answer 12

550 ft-lbs/s

Question 13

Impedance

Answer 13

the total opposition to current flow in an electric circuit

Question 14

Joule

Answer 14

basic unit of electrical energy
amount of work done when 1 A flows through 1 Volt for 1 second

Question 15

Neutral conductor

Answer 15

grounded conductor of a power system
connected to ground potential and is considered to be a current-carrying conductor

Question 16

Ohm

Answer 16

unit of measure for electrical resistance

Question 17

Ohm’s law

Answer 17

set of electrical laws that permits electrical quantities to be calculated mathematically

Question 18

Potential difference

Answer 18

difference between positive and negative charges developed by a power source

Question 19

Power is measured in what unit

Answer 19

watts

Question 20

Power

Answer 20

describes amount of electrical energy converted to some other form

Question 21

Resistance

Answer 21

opposition to current flow in an electrical circuit

Question 22

Volt

Answer 22

measure of EMF
potential necessary to cause 1 C to produce 1 J of energy

Question 23

Watt

Answer 23

measure of true power

Question 24

Coulomb’s law

Answer 24

force of electrostatic attraction or repulsion is directly proportional to the product of the2 charges and inversely proportional to the distance between them

Question 25

What is the SI unit of electrical charge

Answer 25

the coulomb

Question 26

1 Coulomb is defined as

Answer 26

the amount of electric charge that is transferred by a current of 1 ampere in 1 second

Question 27

1 Amp equals

Answer 27

1 C/s

Question 28

Conventional current flow theory

Answer 28

current flows from the positive terminal to the negative one

Question 29

Electron flow theory

Answer 29

current flows from the negative terminal to the positive

Question 30

In a circuit, what condition must be met for current to flow

Answer 30

there needs to be a complete path, aka a closed circuit

Question 31

Components of a basic circuit

Answer 31

load switch conductor power source

Question 32

Short circuit

Answer 32

when there is little to no resistance in a circuit which leads to excessive current flow

Question 33

Voltage aka

Answer 33

potential difference EMF

Question 34

The force that pushes the electrons through a wire is

Answer 34

the voltage

Question 35

What letter represents voltage in mathematical equations

Answer 35

E

Question 36

What happens when there is little to no resistance in a circuit

Answer 36

excessive amount of current flows causing a short circuit

Question 37

How are resistance and current related

Answer 37

they are inversely proportional if R increases, current decreases and vice versa

Question 38

What is produced as current flows

Answer 38

heat

Question 39

Power formula

Answer 39

P = E x I (power = volts times amps, or volts times current)

Question 40

calorie

Answer 40

amount of heat required to raise the temperature of 1 g of water by 1 degree C

Question 41

Ohm's law: volts and amps

Answer 41

1 volt is required to push 1 Amp through 1 ohm

Question 42

Ohm's law formula

Answer 42

E = IR (volts = amps times resistance)

Question 43

A _________ ________ must exist before electricity can flow through a circuit

Answer 43

complete path

Question 44

A circuit with a complete path for electrical flow is called a ________ _______

Answer 44

closed circuit

Question 45

If a circuit path is incomplete or broken it is an ______ _____

Answer 45

open circuit

Question 46

Can electrons flow through an open circuit

Answer 46

no they cannot

Question 47

Volt/Voltage is also known as

Answer 47

electrical pressusre

Question 48

What does Ohm's law state

Answer 48

the current flowing through a circuit is directly proportional to the voltage and indirectly proportional to the resistance

Question 49

Kilo

Answer 49

1,000

Question 50

Hecto

Answer 50

100

Question 51

Deca

Answer 51

10

Question 52

Deci

Answer 52

0.1 or 1/10

Question 53

Centi

Answer 53

0.01 or 1/100

Question 54

Milli

Answer 54

0.01 or 1/1000

Question 55

Micro

Answer 55

10E-6

Question 56

Mega

Answer 56

Million or 10E6