# unit 1 section 2 - Electricity

HideShow resource information
What is current?
The rate of flow of charge
1 of 20
What is the equation for Current involving charge and time?
I=Q/t
2 of 20
What is the unit of charge?
Coulomb
3 of 20
What is a coulomb?
The amount of charge that passes in 1 second when the current is 1A
4 of 20
What is the drift velocity?
The average velocity of all the electrons
5 of 20
What is the equation for current involving drift velocity?
I=nAvq
6 of 20
What does each letter stand for in I=nAvq?
I - current, n - number of charge carries, A - cross sectional area, v - drift velocity, q - charge carried in C by each carrier
7 of 20
What are the charge carriers in a metal?
Free electrons.
8 of 20
Do semi conductors have more or fewer charge carriers than metals?
Fewer charge carriers
9 of 20
What are the charge carriers in liquids and gasses?
Ions
10 of 20
What is potential difference?
Energy converted per unit charge moved
11 of 20
What is the equation for PD?
V=W/Q
12 of 20
On an I/v graph, what axis are I and V on?
I is on the y and V is on the x
13 of 20
What is power?
The rate of transfer of energy.
14 of 20
What are the 3 power equations?
P=VI, P=V^2/R, P=I^2R
15 of 20
What do add to the equation to find the total energy transferred?
add t the the end so it times by time.
16 of 20
what unit do electricity companies use?
Kilo-watt hours
17 of 20
what is internal resistance?
The resistance in side the battery itself.
18 of 20
What is EMF?
The amount of electrical energy the battery produces for each coulomb of charge.
19 of 20
Is EMF a force?
No its measured in volts.
20 of 20

## Other cards in this set

### Card 2

#### Front

What is the equation for Current involving charge and time?

I=Q/t

### Card 3

#### Front

What is the unit of charge?

### Card 4

#### Front

What is a coulomb?

### Card 5

#### Front

What is the drift velocity?