The Ohm’s Law Circuit Diagram comprises a resistance connected in series with a DC voltage source.
Two parallel lines having one with comparatively larger length represents the DC Source and a Zig-Zag symbol represents the resistor. Whereas the simple lines are used to represent the wires.
Now let’s start learning the basic mathematics of law using 10 Different Examples.
Example 1: A 10V battery connects in series with a 20k ohm Resistance. Find the current flowing through the circuit.
Solution: Using V1 = I1 R1.
I1 = V1/R1 = 0.5 mA
Example 2: A 15V source connects with an unknown resistor. The value of current is measured as 5 mA. Find the value of R.
Solution: R2= V2/ I2 = 15V / 5mA = 3kΩ
Example 3: A 50k Resistor joins with a 25VDC Variable Supply. Find the value of unknown current that is flowing through this circuit.
Solution: I3 = V3 / R3 = 25V / 50k = 0.5mA
Example 4: The power dissipation through a 29k Resistance is 15watt. Find the value of current and input voltages supplied by the source.
Solution: Here the formulas: I = SQRT(P/R) and V = SQRT(P*R) will be used. You can learn about all these formulas from Ohmic Wheel.
Example 5: R5 = 10Ω and P5 = 20watt
Solution: V5 = 14.14 and I5 = 1.414