Chapter 18, Problem 28P

### 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 dead battery is charged by connecting it to the live battery of another car with jumper cables (Fig. P18.28). Determine the current in (a) the starter and in (b) the dead battery.Figure P18.28

(a)

To determine

The current in the starter.

Explanation

Given Info:

The below figure shows the direction of current flow in the circuit

• Vlive is voltage in live battery
• R1,R2,R3 is corresponding resistance in the circuits
• I1,I2,I3 is corresponding current in the circuits

Formula to calculate the expression for the current in the live batteries by Kirchhoffâ€™s voltage law

Vliveâˆ’R1I1âˆ’R3I3=0 (1)

Substitute 12â€‰V for Vlive,0.010â€‰Î© for R1,0.060â€‰Î© for R3,in the above equation to find the expression for I1

Formula to calculate the expression for the current in the dead batteries by Kirchhoffâ€™s voltage law

(b)

To determine

The current in the dead battery.

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