Download Ohm`s Law - Blackboard

Ohm’s Law
V= Voltage (V)
I = Current in amps (A)
R = Resistance in ohm’s (Ω)
For voltage use V= I x R
For current use I = V / R
For resistance use R = V / I
You Try it!

3V is applied across a 6 Ω resistor, what is the current?
Voltage = 3v
Resistance = 6Ω
I (current) = ?
Formula is I = V/R
I = 3V/6 Ω
I = 3/6
= 0.5A

A lamp connected to a 6V battery passes a current of 0.1 A, what is the lamp’s
resistance?
V=6v
I=0.1A
R =?
R=V/I
R = 6 / 0.1
R = 60 Ω

A 1200 Ω resistor passes a current of 0.2 A, what is the voltage across it?
R = 1200Ω
I= 0.2A
V=?
V=IxR
V = 0.2 x 1200
V = 240V