Electricity Basics

Electricity is the movement of ____. Electrons are _____ charged.

• electrons, negatively

• Negative, positive

• protons, negatively

• electrons, positively

There are _ types of electric charges.

• 1

• 2

• 3

• 4

The rate at which charge is flowing.

• resistance

• voltage

• current

• amperes

The difference in charge between 2 points.

• resistance

• voltage

• current

• amperes

The amount of current that is flowing.

• resistance

• voltage

• current

• amperes

Ohms law rearranged for resistance states that R=E/I in which:

• E=voltage, I= Currents (ohms), R= resistance

• R=voltage, E=voltage, I=resistance

• R= Resistance (ohms), E= voltage, I=Current

• R=reciprocal, E=Current, I=intensity

This is the most common conductor used in buildings and homes. It has a high melting point which is good for fire resistance.

• rubber

• aluminum

• wool

• copper

The difference between Alternating and Direct current.

• Alternating can only flow in one direction

• Direct flows in multiple directions.

• Alternating can change periodically while direct flows in two directions.

• Alternating can change periodically while direct only flows in one direction

The frequency of cycles that a current cycles around a circuit in one direction and then alternates to another direction.

• Watts

• Ohms

• Hertz

• Heinz

Active power is the real usable powe, Reactive power is the piece flows through that doesn't do any work, and Apparent (potential) power is a measurement of all the power being delivered.

• False

• True