Chapter 18, Problem 50AP

### 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

# Three 60.0-W, 120-V lightbulbs are connected across a 120-V power source, as shown in Figure P18.50. Find (a) the total power delivered to the three bulbs and (b) the potential difference across each. Assume the resistance of each bulb is constant (even though, in reality, the resistance increases markedly with current).Figure P18.50

To determine
The value of each resistor.

Explanation

Formula to calculate the power delivered in series circuit is,

Î”Pseries=I2(R1+R2) (I)

• I is the current.
• R1 and R2 are the resistances.

Formula to calculate the power delivered in parallel circuit is,

Î”Pparallel=I2(R1R2R1+R2) (II)

Substitute 225 W for Î”Pseries and 5 A for I in Equation (I).

225â€‰W=(5â€‰A)2(R1+R2)

On Re-arranging,

Substitute 50.0 W for Î”Pparallel , 9â€‰Î© for R1+R2 and 5 A for I in Equation (II).

50

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started