# ICP Electricity

### 30 terms by peoneill Teacher

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### Electric charge

comes from an imbalance of electrons and protons; causes things to attract or repel

### Electric force

the force caused by electric charge; opposites attract and like charges repel

Coulomb (C)

### Electric force and distance

Stronger at close distances, weaker at long distances

### Electric potential

The potential energy caused when electric charges have the chance to make an electric force.

### Current

the rate that electric charges move through a conductor

### Current Formula

current = charge/time
I = q/t

### Electrons

negative charge carriers; the flow of electrons is what causes current

### Conductor

conducts electricity and allows electrons to flow through it (metals, humans, water)

### Insulator

do not conduct electricity (rubber, plastic, air, non-metals

positive charges

negative charges

forward

backward

### When charges are stronger... (what do we do with field lines?)

draw more field lines

they NEVER cross

### Potential energy

the capacity to do work

### Gravity

all mass is attracted to all mass; height represents potential energy

### Voltage

the difference in electrical potential energy between two places in a circuit; tells you which way charges want to move and how badly (like a map of where charges want to go)

Amperes (A)

### Resistance

is caused by internal friction that slows down the movement of charge through a conductor

### Insulator (resistance)

very high resistance

low resistance

### Semiconductor (resistance)

medium resistance

zero resistance

### Resistance equation

V = IR
Voltage (electric potential) =
Current x Resistance

### Resistance units

Ohms (Ω say "omega")

### Semiconductors

insulators in their natural state, but can be manipulated so that sometimes they conduct, and sometimes they don't

### Semiconductors on the periodic table

Can be found right on the line between metals and non-metals

### Maglev

A train that floats above a magnetic track; the tracks are superconductors

Example: