# Chapter 23 - Think and Rank: 56

a. currents, greatest to least: C, B, A. b. voltages, greatest to least: A = B = C.

#### Work Step by Step

a. In a simple parallel circuit, the sum of the branch currents add up to the total current supplied by and flowing through the voltage source. This is Rule 3 for parallel circuits, on page 444, and discussed on pages 443-444. This is also illustrated in Figure 23.18. This means that the current through the battery is the greatest of all. We also conclude that Branch B carries more current than branch A. In branch A, the bulbs are in series and share the voltage. The voltage across the one bulb in branch B is twice the voltage across each of the bulbs in the top branch, A. Therefore, twice the current flows in branch B compared to branch A. b. For two or more devices connected in parallel, the voltage is the same across each device. This is Rule 1 for parallel circuits, on page 444, and discussed on pages 443-444. Consider the top branch as one device. We see that the voltage across each branch is the same as the battery voltage.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.