Ohm’s Law Practice Problems
Using Ohm’s Law, solve the following problems. Be sure to show
all work. Formula: V (voltage)= I (current) X R (resistance)
1. What is the voltage if a resistance of 25 Ω produces a current of
250 amperes?
2. What is the current produced by a voltage of 240 V through a
resistance of 0.2 Ω?
3. What voltage is necessary to produce a current of 200 amperes
through a resistance of 100 Ω?
4. What resistance would produce a current of 120 amps from a 6-V
battery?
5. What is the current produced by a 9-V battery flowing through a
resistance of 200 Ω?
6. What voltage produces a current of 500 amps with a resistance of
50 Ω?
7. What resistance would produce a current of 200 amps with a voltage
of 2,000 V?
8. What is the current produced with a 9-V battery through a
resistance of 100 Ω?
© The Trendy Science Teacher 2017
Ohm’s Law Practice Problems
Answer Key
1.
What is the voltage if a resistance of 25 Ω produces a current of 250 amperes?
V=IxR
V = (250) (25)
V=6250 Volts
2. What is the current produced by a voltage of 240 V through a resistance of 0.2 Ω?
I=V÷ R
I = (240) ÷ (0.2)
I = 1200 Amps
3. What voltage is necessary to produce a current of 200 amperes through a resistance of
100 Ω?
V=IxR
V = (200) (100)
V=20,000 Volts
4. What resistance would produce a current of 120 amps from a 6-V battery?
R=V÷ I
R = (6) ÷ (120)
R = 0.05 Ohms (Ω)
5. What is the current produced by a 9-V battery flowing through a resistance of 200 Ω?
I=V÷ R
I = (9) ÷ (200)
I = 0.05 Amps
6. What voltage produces a current of 500 amps with a resistance of 50 Ω?
V=IxR
V = (500) (50)
V = 25,000Volts
7. What resistance would produce a current of 200 amps with a voltage of 2,000 V?
R=V÷ I
R = (2000) ÷ (200)
R = 10 Ohms (Ω)
8. What is the current produced with a 9-V battery through a resistance of 100 Ω?
I=V÷ R
I = (9) ÷ (100)
I = 0.09 Amps
© The Trendy Science Teacher 2017