Vaiables and Fact (that I need to know)

R

Resistance

V

Voltage

Measured in Volts

E

Energy/Elementary Charge

Q

Charge

T

Time

W

Watts

I

Current

To Find Volts: 1V=1J/1C

V=IR

E=VIT

Elementary Charge

Energy

= 1.6x10^-19

Q=ne

Seconds/1

Seconds can be written as : s

s/1

E=VIT

E=VIT

R=V/I

Electromotive Force

Also known as EMF

E=W/Q

V=W/Q

V and E can switch

1V=1J/1C

Columb = 6.4x10^19

Measured in Volts

Potential difference

Can be shortned to P.D.

V=W/Q

1V=1J/1C

Measured in volts

Measured with a Voltmeter

Work

Reduces the current flowing through a conductor

Influenced by

Heat (More heat, the more resistance)

Type of Material

Cross section area (the more, the less resistance)

Length (the more length, the more resistance)

Power

Is energy used in a length of time

Work (W) done is a certain time

P=E/T

P=W/T

P=Work/Time

P=VIT

T=VI

P=VI

New Equations

P=E/T

P=VI

P=(I^2)R

P=(V^2)/R

Kirchhoff's Law

Series

Paralles

V(0)=V(1)+V(2)+V(3)

I(0)=I(1)=I(2)=I(3)

R(s)=R(1)+R(2)+R(3)

V(0)=V(1)=V(2)=V(3)

I(0)=I(1)+I(2)+I(3)

R(p)=1/R(1)+1/R(2)+1/R(3)