Physics Electric Charge and Current - EPHS

Symbol for charge

q

Symbol for current

I

Symbol for Drift Velocity

Vd

Symbol for Electric Potential Energy

U, PE

Symbol for Electric Potential

V

Symbol for Potential difference

(VOLTAGE) delta V

Symbol for resistance

R

Symbol for power

P

Symbol for energy

E

Unit for Charge

Coulomb C

Unit for current

Ampere, Amps A

Unit for Drift velocity

m/s

Unit for Electric potential energy

Joule J

Unit for Electric potential

Volt V

Unit for Potential difference

(VOLTAGE) Volt V

Unit for resistance

Ohms

Unit for power

Watt W

Unit for energy

Joule J

Actual electric “stuff” carried by electrons

Charge

Rate of flow of charge

Current

Average speed of individual electrons

drift velocity

Energy a charge posses because of its position in an electric field

Electric potential energy

Location with least electric PE

negative terminal

Location with greatest electric potential

positive terminal

Amount of work done or energy transferred

Energy

Rate at which energy is transferred

Power

Opposition to charge flow

resistance

Difference in electric potential between 2 locations

Potential difference (VOLTAGE)

Electric PE per coulomb at a location

Electric Potential

Flows around, not used up

Charge

Same everywhere, charge per second

Current

Very slow (mm/s)

drift velocity

increases in battery, decreases in bulb/resistor

Electric Potential Energy

Highest near batteries positive terminal, lowest near the negative terminal

Electric Potential

Created by battery, dropped across resistors/bulbs

Potential difference (VOLTAGE)

Causes voltage drops and energy transfer

resistance

determines how quickly a device uses energy

Power

Stored in batteries

Energy

Charge leaves here with max energy

positive terminal

Charge returns here after losing energy

negative terminal

Charge is similar to

Water in a pipe

Current is similar to

water flow rate

drift velocity is similar to

speed of each water molecule

Electric Potential energy is similar to

gravitational PE

Electric potential is similar to

height above the ground

Potential difference is similar to

height difference

Resistance is similar to

the friction of a pipe

Power is similar to

Speed of spending money

Energy is similar to

the total money in the bank

The positive terminal is similar to

Top of a water slide

The negative terminal is similar to

the bottom of a water slide

Bulbs use ___, not ____

Energy Charge

Large current means more ____ pass each ____

Charges Second

Drift velocity is not the same as

Current

Electric Potential Energy is not

Electric potential

Electric potential is not

Total energy (energy/coulomb)

Voltage does not

flow

Higher resistance =

lower current

Power =

rate

Energy =

amount

Conventional current leave here

Positive terminal

Lowest electric potential in the circuit

negative terminal