The Mystery of Lamp Resistance

What is the resistance of a lamp connected to a 2 V DC power supply with a current of 0.7 A?

Can you calculate the resistance of the lamp?

Calculation of Resistance

The resistance of the lamp is approximately 2.857 ohms.

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, given a constant temperature. Mathematically, it can be expressed as V = IR, where V is the voltage, I is the current, and R is the resistance of the conductor.

To calculate the resistance of the lamp, we can use Ohm's law. Given that the lamp is connected to a 2 V DC power supply and the current through the lamp is 0.7 A, we can plug these values into the equation:

R = V/I = 2 V / 0.7 A = 2.857 ohm