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Chapter 18: Problem 61

If a chandelier has a label stating \(120 \mathrm{V}, 5.0 \mathrm{A},\) can its power rating be determined? If so, what is it?

Short Answer

Expert verified
Answer: The power rating of the chandelier is 600 W.

Step by step solution

01

Write down the given values

The voltage rating is 120 V and the current rating is 5.0 A.
02

Calculate the power rating

Using the formula for power, \(P = IV\), where \(P\) is power, \(I\) is current, and \(V\) is voltage. Multiply the voltage (120 V) by the current (5.0 A) to find the power rating.
03

Compute the power rating

\(P = (120 \mathrm{V})(5.0 \mathrm{A}) = 600 \mathrm{W}\)
04

Write the final answer

The power rating of the chandelier is 600 W.

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Most popular questions from this chapter

A copper wire of cross-sectional area \(1.00 \mathrm{mm}^{2}\) has a current of 2.0 A flowing along its length. What is the drift speed of the conduction electrons? Assume \(1.3 \mathrm{con}-\) duction electrons per copper atom. The mass density of copper is \(9.0 \mathrm{g} / \mathrm{cm}^{3}\) and its atomic mass is \(64 \mathrm{g} / \mathrm{mol}\).
A 2.00 - \(\mu\) F capacitor is charged using a \(5.00-\mathrm{V}\) battery and a 3.00 - \(\mu\) F capacitor is charged using a \(10.0-\mathrm{V}\) battery. (a) What is the total energy stored in the two capacitors? (b) The batteries are disconnected and the two capacitors are connected together \((+\text { to }+\) and \- to \(-\) ). Find the charge on each capacitor and the total energy in the two capacitors after they are connected. (c) Explain what happened to the "missing" energy. [Hint: The wires that connect the two have some resistance.]
(a) Given two identical, ideal batteries (emf \(=\mathscr{E}\) ) and two identical light-bulbs (resistance \(=R\) assumed constant), design a circuit to make both bulbs glow as brightly as possible. (b) What is the power dissipated by each bulb? (c) Design a circuit to make both bulbs glow, but one more brightly than the other. Identify the brighter bulb.
A piece of gold wire of length \(L\) has a resistance \(R_{0}\) Suppose the wire is drawn out so that its length increases by a factor of three. What is the new resistance \(R\) in terms of the original resistance?
Refer to Problem \(34 .\) With the copper wire connected to an ideal battery, the current increases greatly when the wire is immersed in liquid nitrogen. Ignoring changes in the wire's dimensions, state whether each of the following quantities increases, decreases, or stays the same as the wire is cooled: the electric field in the wire, the resistivity, and the drift speed. Explain your answers.
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