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Flashcards in Electricity Deck (12):
1

What is a Hertz

how many times in a second the voltage alternates from + to – and back again

2

What frequency does the US typically use?

60Hz

3

What other frequency can commonly be found around the world

50Hz

4

What is Ohms Law

Voltage = Current * Resistance
V=IR

5

What is the definition of an Ohm

the resistance value through which one volt will maintain a current of one ampere.

6

What is resistance

how much current flows through a component.

7

Define Power

Power = Current * Voltage
P=IV
OR
P=I^2*R

8

Define Voltage

the difference in electrical
potential between two points in a circuit

9

Define Current

the time rate of flow of electric charge through an area

10

What are the characteristics of a grounding rod

Grounding rod (copper clad steel)
• Must be 1⁄2 diameter
• Installed below permanent moisture level
• Must be no less than 8’ in length
• Must be in ground at least 8’
• Drive so upper end is flush with ground

11

What is bonding

the permanent joining of metallic parts to form an electrically conductive path that ensures electrical continuity and the capacity to conduct safely any current likely to be imposed

12

1 horsepower = ? Watts

750