Question

How much power is required to light a lightbulb at 100V of voltage when the lightbulb has a resistance of 500 Ohms?

Answer 1

Power = 20 Watts

Step-by-step explanation:

Given the following data;

Voltage = 100 V

Resistance = 500 Ohms

To find the power that is required to light a lightbulb;

Mathematically, power can be calculated using the formula;

`Power = \frac {Voltage^(2)}{resistance}`

Substituting into the formula, we have;

`Power = \frac {100^(2)}{500}`

`Power = \frac {10000}{500}`

Power = 20 Watts