1. Ohm’s Law Practice Problem Set Name: ___________________________
The formula for Ohm’s Law is:
Voltage (V) = Current (A) x Resistance (Ω)
V = I x R
Practice Problems – Round all answers to the tenths place.
1. Your circuit contains two 9 V battery and a 5 Ω resistor. What is its current? V I R
2. You plug your hair dryer into a 120 V outlet, which carries 210 A of current. Calculate resistance.
3. Calculate how much voltage is needed for an appliance that carries 480 A of current and has 0.25 Ω of resistance.

2. Current and Resistance are _________________________________ related.
Calculate the missing data, graph the data, and indicate whether the variables are directly (both go up or go down together) or indirectly (one goes up, the other goes down) related.
Voltage
Current
Resistance
120 V
5 A
10 A
15 A
20 A
25 A
30 A
Resistance (Ω )
Current (A)
Current and Resistance are _________________________________ related.

3. Voltage and Resistance are _________________________________ related.
Calculate the missing data, graph the data, and indicate whether the variables are directly (both go up or go down together) or indirectly (one goes up, the other goes down) related.
Voltage
Current
Resistance
3 V
2 A
6 V
9 V
12 V
15 V
18 V
Resistance (Ω )
Voltage (V)
Voltage and Resistance are _________________________________ related.

4. Current and Voltage are _________________________________ related.
Calculate the missing data, graph the data, and indicate whether the variables are directly (both go up or go down together) or indirectly (one goes up, the other goes down) related.
Voltage
Current
Resistance
2 A
5 Ω
1 A
5 Ω
4 A
0 A
3 A
5 A
Voltage (V)
Current (A)
Current and Voltage are _________________________________ related.