Chapter 18, Problem 47AP

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# (a) Calculate the potential difference between points a and b in Figure P18.47 and (b) identify which point is at the higher potential.Figure P18.47

(a)

To determine
The potential difference between the points a and b.

Explanation

No current flows through the 4.00 V battery and 10.0â€‰Î© resistor. This is because the circuit is open at points a and b.

Formula to calculate the current through the closed loop is,

I=Î”VReq

• Req is the equivalent resistance of the loop.
• Î”V is the potential difference.

The equivalent resistance is,

• Îµ0 is the permittivity of free space.
• A is the cross sectional area.

Substitute 6.00Î© for R and 12.0 V for Î”V

(b)

To determine
The point with higher potential.

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