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Flashcards in 5.2 Measuring Electricity Deck (18)
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1

Measuring electricity is essentially finding out _____, ______, and ______ the electricity flows through a conductor.

how much, how fast, and with what force

2

Amperage (I)

The rate of the flow of current

3

What is the unit used to measure current?

Ampere or amp (A)

4

The equipment where electricity enters a house is usually rated at how many amps?

100 A or 200 A

5

Electromotive force (E or emf)

The pressure created by electrical potential that moves electrons through a conductor

6

What is the unit of measure for electromotive force?

Volt (V)

7

Most residential wiring is rated at how many volts?

120 V and 240 V

8

Resistance (R)

The opposition to the flow of electrons through a conductor, similar to friction

9

What is the unit of measure for resistance?

Ohms (Ω)

10

When wire is used as a conductor, its resistance is primarily based on what three factors?

Material, diameter, and length

11

Power (P)

The rate of doing work

12

What is the unit of measurement for power?

Watts (W) or volt-amperes (VA)

13

Power determines how fast a certain amount of ____ is consumed by a ____.

Energy; load

14

Work

How much power is consumed over a period of time

15

What do joules (J) measure?

Work

16

One joule is one ______.

Watt-second

17

What do kilowatt-hours measure?

Work

18

One kilowatt-hour is equivalent to ____ watts bein used for ____.

1000; one hour