Chapter 32: Q. 62 (page 926)

Lightbulbs labeled $40 W, 60 W$ and $100 W$ are connected to a $120 V / 60 H z$ power line as shown in the figure .What is the rate at which energy is dissipated in each bulb?

Short Answer

Expert verified

The rate at which energy is dissipated in each bulb is

$I = 0.2 A, P_{1} = 14.4 W, P_{2} = 9.6 W$

Step by step solution

Given Information

We have been given that light bulbs of $40 W, 60 W a n d 100 W$ are connected to a $120 V / 60 H z$ powerline and we have to find the rate at which energy is dissipated in each bulb.

Simplification

For the bulb of $40 W$ :

$P_{1} = \frac{V^{2}}{R_{1}}$

For the $60 W$ bulb:

$P_{2} = \frac{V^{2}}{R_{2}}$

$R_{2} = 240 Ω$

The total resistance is:

$600 o h m$

The power dissipation in $40 W$ bulb is:

$P_{d i s_{1}} = 14.4 W$

The power dissipation in bulb is:

$P_{d i s_{2}} = 9.6 W$

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Lightbulbs labeled $40 W, 60 W$ and $100 W$ are connected to a $120 V / 60 H z$ power line as shown in the figure .What is the rate at which energy is dissipated in each bulb?

Short Answer

Step by step solution

Given Information

Simplification

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Lightbulbs labeled 40W,60Wand 100W are connected to a120V/60Hzpower line as shown in the figure .What is the rate at which energy is dissipated in each bulb?

Short Answer

Step by step solution

Given Information

Simplification

One App. One Place for Learning.

Most popular questions from this chapter

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Kinematics Physics

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Study anywhere. Anytime. Across all devices.

Lightbulbs labeled $40 W, 60 W$ and $100 W$ are connected to a $120 V / 60 H z$ power line as shown in the figure .What is the rate at which energy is dissipated in each bulb?