The brightness of a bulb is determined by power.

Power:

$\overline{){\mathbf{P}}{\mathbf{=}}{{\mathbf{i}}}^{{\mathbf{2}}}{\mathbf{R}}}$

Since the bulbs are identical, the resistance in each is the same.

Therefore, the power depends on the current passing through each bulb only.

The five identical bulbs in the following figure are all glowing. The battery is ideal.

What is the order of brightness of the bulbs, from brightest to dimmest? Some may be equal.

A. P = S = T > Q = R

B. P > S = T > Q = R

C. P > Q = R > S = T

D. P = S > Q = R = T

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Power in Circuits concept. You can view video lessons to learn Power in Circuits. Or if you need more Power in Circuits practice, you can also practice Power in Circuits practice problems.

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Based on our data, we think this problem is relevant for Professor Golightly's class at CAL.