Question

A light bulb is plugged into a wall outlet (220V) and it uses. 0.68A. What is the lights bulbs resistance?

Answer 1

Answer:

Resistance = 323.53 ohms

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

$V = IR$

Where;

• V represents voltage measured in voltage.

• I represents current measured in amperes.

• R represents resistance measured in ohms.

Given the following data;

Voltage = 220V

Current = 0.68A

To find the resistance;

$R = \frac {V}{I}$

Substituting into the equation, we have;

$R = \frac {220}{0.68}$  

Resistance, R = 323.53 ohms

Therefore, the resistance of the light bulbs is 323.53 ohms.