Ohms Law

Ohm’s Law is a fundamental principle in electricity that explains the relationship between voltage, current, and resistance in an electrical circuit. It states that the current flowing through a circuit is directly proportional to the voltage applied across it and inversely proportional to the resistance of the circuit. The mathematical formula for Ohm’s Law is: V=I×RV = I \times R

Where:

• V is voltage (measured in volts), representing the “push” that drives electric charge through the circuit.
• I is current (measured in amps), which is the flow of electric charge.
• R is resistance (measured in ohms), which opposes the flow of current.

To understand it simply, imagine electricity like water flowing through a pipe:

• Voltage is like water pressure pushing the flow.
• Current is the water flowing through the pipe.
• Resistance is anything in the pipe (like a clog) that slows the flow.

If the voltage increases, more current flows, provided the resistance remains constant. If resistance increases, less current flows, even if the voltage stays the same.

For example, if a light bulb has a resistance of 10 ohms and is connected to a 5-volt battery, you can calculate the current using Ohm’s Law: I=VR=510=0.5 amps.I = \frac{V}{R} = \frac{5}{10} = 0.5 \text{ amps.}

Ohm’s Law is essential for designing and troubleshooting electrical systems. It helps determine the right components, prevent overloads, and ensure circuits operate safely and efficiently.