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Chapter 18: Q41P (page 759)

Question:In figure 18.102 suppose that VC-VF=8 V and VD-VE=4.5 V.

(a) What is the potential difference VC-VD?

(b) If the element between the battery C and D is a battery, is the + end of the battery at C or D?

Short Answer

Expert verified

The potential difference between C and D is 3.5V.

Step by step solution

01

Identification of given data

The potential difference between C and F is VC-VF=8V.

The potential difference between D and E isVD-VE=4.5V.

The potential difference between point C and D is found by applying KVL rule in the second loop.

02

Determination of potential difference between point C and D

Apply Kirchhoff鈥檚 voltage rule in second loop to find the potential difference between C and D:

VC-VF-VD-VE-VC-VD=0

VC-VD=VC-VF-VD-VE

Substitute all the values in above equation.

VC-VD=8V-4.5VVC-VD=3.5V

Therefore, the potential difference between C and D is 3.5V.

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