Question

in the following circuit, if the potential difference across the 174 \\(\omega\\) resistor is 4.26 v, what is the power of the bulb?

0.0897 w
0.219 w
0.554 w
0.348 w

Explanation:

Identify the circuit configuration

Using the Series and Parallel Circuits knowledge point

$$
LATEXBLOCK0
$$

Calculate the circuit current

Using the Ohm's Law knowledge point

$$
LATEXBLOCK1
$$

Determine the voltage across the bulb

Using the Circuit Analysis knowledge point

$$
LATEXBLOCK2
$$

Calculate the power of the bulb

We calculate the electrical power dissipated by the bulb using the current and voltage.

$$
LATEXBLOCK3
$$

Answer:

• 0.0897 W
• 0.219 W (Correct answer)
• 0.554 W
• 0.348 W