Ohm’s law equation describes the relationship between voltage (V), current (I) and resistance (R). Here’s the equation of ohm’s law: V = I × R
Let’s solve some problems based on this equation, so you’ll get a clear idea.
Ohm’s Law Practice Problems
Problem 1: Calculate the current flowing through an electronic device which has a resistance of 4 Ω and the voltage of 8 V.
Solution:
Given data:
Current, I = ?
Resistance, R = 4 Ω
Voltage, V = 8 V
Using the equation of ohm’s law,
V = I × R
8 = I × 4
I = 2 A
Therefore, the current flowing through an electronic device is 2 A.
Problem 2: A 5 A current is flowing through a 15 Ω resistor. Calculate the voltage across a resistor.
Solution:
Given data:
Current, I = 5 A
Resistance, R = 15 Ω
Voltage, V = ?
Using the equation of ohm’s law,
V = I × R
V = 5 × 15
V = 75 V
Therefore, the voltage across a resistor is 75 V.
Problem 3: An electric circuit has a voltage of 5 V and a current of 10 A. Calculate the resistance of an electric circuit.
Solution:
Given data:
Voltage, V = 5 V
Current, I = 10 A
Resistance, R = ?
Using the equation of ohm’s law,
V = I × R
5 = 10 × R
R = 0.5 Ω
Therefore, the resistance of an electric circuit is 0.5 Ω.
Problem 4: What is the electric current flowing through a 12 Ω resistor with a voltage of 60 V?
Solution:
Given data:
Current, I = ?
Resistance, R = 12 Ω
Voltage, V = 60 V
Using the equation of ohm’s law,
V = I × R
60 = I × 12
I = 5 A
Therefore, the electric current flowing through a resistor is 5 A.
.
.
.
Related:
