- Voltage (V): It is the electric potential difference between two points. It pushes electric charges through a circuit and is measured in volts (V).
- Current (I): It is the flow of electric charge in a circuit. It is measured in amperes (A) and depends on voltage and resistance.
- Resistance (R): It is the opposition to current flow in a circuit. It is measured in ohms (Ω).
Ohm’s Law:
The relationship between voltage, current, and resistance is given by Ohm’s Law:
V=I×RV = I \times R
This means that voltage is directly proportional to current when resistance is constant. If resistance increases, current decreases, and vice versa. This law helps in designing and analyzing electrical circuits.