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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 person can be killed if a current as small as \(50 \mathrm{mA}\) passes near the heart. An electrician is working on a humid day with hands damp from perspiration. Suppose his resistance from one hand to the other is $1 \mathrm{k} \Omega$ and he is touching two wires, one with each hand. (a) What potential difference between the two wires would cause a 50 -mA current from one hand to the other? (b) An electrician working on a "live" circuit keeps one hand behind his or her back. Why?
What is the current in a \(60.0-\mathrm{W}\) bulb when connected to a \(120-\mathrm{V}\) emf?
A Vespa scooter and a Toyota automobile might both use a \(12-\mathrm{V}\) battery, but the two batteries are of different sizes and can pump different amounts of charge. Suppose the scooter battery can pump 4.0 kC of charge and the automobile battery can pump \(30.0 \mathrm{kC}\) of charge. How much energy can each battery deliver, assuming the batteries are ideal?
Copper and aluminum are being considered for the cables in a high-voltage transmission line where each must carry a current of \(50 \mathrm{A}\). The resistance of each cable is to be \(0.15 \Omega\) per kilometer. (a) If this line carries power from Niagara Falls to New York City (approximately $500 \mathrm{km}),$ how much power is lost along the way in the cable? Compute for each choice of cable material (b) the necessary cable diameter and (c) the mass per meter of the cable. The electrical resistivities for copper and aluminum are given in Table \(18.1 ;\) the mass density of copper is $8920 \mathrm{kg} / \mathrm{m}^{3}\( and that of aluminum is \)2702 \mathrm{kg} / \mathrm{m}^{3}$
A 6.0 -pF capacitor is needed to construct a circuit. The only capacitors available are rated as \(9.0 \mathrm{pF} .\) How can a combination of three 9.0 -pF capacitors be assembled so that the equivalent capacitance of the combination is \(6.0 \mathrm{pF} ?\)
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