College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300

College Physics

11th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305952300


Chapter 17, Problem 55AP
Textbook Problem

A particular wire has a resistivity of 3.0 × 10−8 Ω · m and a cross-sectional area of 4.0 × 10−6 m2. A length of this wire is to be used as a resistor that will develop 48 W of power when connected across a 20.-V battery. What length of wire is required?

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Chapter 17 Solutions

College Physics
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Ch. 17 - We have seen that an electric field must exist...Ch. 17 - A 12-V battery is connected across a device with...Ch. 17 - Choose the words that make each statement correct....Ch. 17 - In an analogy between traffic flow and electrical...Ch. 17 - Two copper wires A and B have the same length and...Ch. 17 - Two lightbulbs are each connected to a voltage of...Ch. 17 - Newspaper articles often have statements such as...Ch. 17 - There is an old admonition given to experimenters...Ch. 17 - What could happen to the drift velocity of the...Ch. 17 - Power P0 = I0 V0 is delivered to a resistor of...Ch. 17 - When is more power delivered to a lightbulb,...Ch. 17 - If a current of 80.0 mA exists in a metal wire,...Ch. 17 - A copper wire has a circular cross section with a...Ch. 17 - In the Bohr model of the hydrogen atom, an...Ch. 17 - A typical lightning bolt may last for 0.200 s and...Ch. 17 - A certain laboratory experiment requires an...Ch. 17 - If 3.25 103 kg of gold is deposited on the...Ch. 17 - A 2.0 102-km-long high-voltage transmission line...Ch. 17 - An aluminum wire having a cross-sectional area of...Ch. 17 - An iron wire has a cross-sectional area of 5.00 ...Ch. 17 - An electric heater carries a current of 13.5 A...Ch. 17 - A voltmeter connected across the terminals of a...Ch. 17 - Germanium is a semiconducting metal with a...Ch. 17 - A person notices a mild shock if the current along...Ch. 17 - Suppose you wish to fabricate a uniform wire out...Ch. 17 - Nichrome wire of cross-sectional radius 0.791 mm...Ch. 17 - A wire of diameter 0.800 mm and length 25.0 m has...Ch. 17 - A potential difference of 12 V is found to produce...Ch. 17 - The current supplied by a battery in a portable...Ch. 17 - A wire 50.0 m long and 2.00 mm in diameter is...Ch. 17 - A rectangular block of copper has sides of length...Ch. 17 - The resistivity of copper is 1.70 108 m. (a)...Ch. 17 - The human body can exhibit a wide range of...Ch. 17 - Starting from Ohms law, show that E = J, where E...Ch. 17 - If a certain silver wire has a resistance of 6.00 ...Ch. 17 - Digital thermometers often make use of...Ch. 17 - A length of aluminum wire has a resistance of 30.0...Ch. 17 - Gold is the most ductile of all metals. For...Ch. 17 - At what temperature will aluminum have a...Ch. 17 - At 20.0C, the carbon resistor in an electric...Ch. 17 - A wire 3.00 m long and 0.450 mm2 in...Ch. 17 - (a) A 34.5 -m length of copper wire at 20.0C has a...Ch. 17 - An engineer needs a resistor with a zero overall...Ch. 17 - In one form of plethysmograph (a device for...Ch. 17 - A platinum resistance thermometer has resistances...Ch. 17 - A 5.00-V power supply provides a maximum current...Ch. 17 - If electrical energy costs 0.12 per kilowatt-hour,...Ch. 17 - Residential building codes typically require the...Ch. 17 - A portable coffee heater supplies a potential...Ch. 17 - The heating element of a coffeemaker operates at...Ch. 17 - A typical cell phone consumes an average of about...Ch. 17 - Lightbulb A is marked 25.0 W 120. V, and lightbulb...Ch. 17 - A certain toaster has a heating element made of...Ch. 17 - A copper cable is designed to carry a current of...Ch. 17 - Batteries are rated in terms of ampere-hours (A ...Ch. 17 - The potential difference across a resting neuron...Ch. 17 - The cost of electricity varies widely throughout...Ch. 17 - An electric utility company supplies a customers...Ch. 17 - An office worker uses an immersion heater to warm...Ch. 17 - Two wires A and B made of the same material and...Ch. 17 - A tungsten wire in a vacuum has length 15.0 cm and...Ch. 17 - If a battery is rated at 60.0 A h, how much total...Ch. 17 - A car owner forgets to turn off the headlights of...Ch. 17 - Consider an aluminum wire of diameter 0.600 mm and...Ch. 17 - A given copper wire has a resistance of 5.00 at...Ch. 17 - A particular wire has a resistivity of 3.0 108 ...Ch. 17 - Birds resting on high-voltage power lines are a...Ch. 17 - A 50.0-g sample of a conducting material is all...Ch. 17 - You are cooking breakfast for yourself and a...Ch. 17 - The current in a conductor varies in time as shown...Ch. 17 - A 120.-V motor has mechanical power output of 2.50...Ch. 17 - A Nichrome heating element in an oven has a...Ch. 17 - A length of metal wire has a radius of 5.00 103 m...Ch. 17 - In a certain stereo system, each speaker has a...Ch. 17 - A resistor is constructed by forming a material of...Ch. 17 - When a straight wire is heated, its resistance...Ch. 17 - An x-ray tube used for cancer therapy operates at...Ch. 17 - A man wishes to vacuum his car with a canister...

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