Calculating Resistance of a Lamp Using Ohm's Law

What is the equation that links current, potential difference, and resistance?

The equation that links current, potential difference, and resistance is Ohm's Law, which can be written as V = I * R. Here, 'V' is the potential difference in volts, 'I' is the current in amperes, and 'R' is the resistance in ohms.

Understanding Ohm's Law and Calculating Resistance

Ohm's Law: V = I * R

When a potential difference of 3.3V is applied across a lamp and the current flowing through it is 0.15A, we can determine the resistance of the lamp using Ohm's Law. The formula for calculating resistance from Ohm's Law is R = V / I.

Given:

Potential Difference (V) = 3.3V

Current (I) = 0.15A

Calculating Resistance:

R = V / I

Substituting the given values into the formula:

R = 3.3V / 0.15A = 22 ohms

Conclusion

The resistance of the lamp can be calculated as 22 ohms when a potential difference of 3.3V is applied and the current flowing through it is 0.15A. Ohm's Law provides a simple way to relate current, potential difference, and resistance in an electrical circuit.