Ohm's Law describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It is expressed mathematically as:
V = I * R
where:
V = Voltage (measured in volts, V)
I = Current (measured in amperes, A)
R = Resistance (measured in ohms, Ω)
Ohm's Law states that the voltage across a resistor in an electrical circuit is directly proportional to the current flowing through it, and this relationship is governed by the resistance of the component. In other words, as long as the resistance remains constant, the voltage and current in a circuit are linearly related.
The relationship between voltage and power (P) in a circuit is given by another equation, which can be derived from Ohm's Law:
P = V * I
where:
P = Power (measured in watts, W)
This equation states that the power dissipated or consumed in an electrical circuit is equal to the product of the voltage and the current flowing through the circuit.
To summarize:
Ohm's Law relates voltage (V), current (I), and resistance (R): V = I * R
The relationship between voltage and power is given by: P = V * I
So, in a circuit where Ohm's Law holds, if you know the values of voltage and current, you can use these formulas to calculate the power consumed or dissipated by the circuit.