 20.1CQ: Can a wire carry a current and still be neutral—that is, have a tot...
 20.1PE: What is the current in milliamperes produced by the solar cells of ...
 20.2CQ: Car batteries are rated in amperehours ( A ? h ). To what physical...
 20.2PE: A total of 600 C of charge passes through a flashlight in 0.500 h. ...
 20.3CQ: If two different wires having identical crosssectional areas carry...
 20.3PE: What is the current when a typical static charge of 0.250 µC moves ...
 20.4CQ: Why are two conducting paths from a voltage source to an electrical...
 20.4PE: Find the current when 2.00 nC jumps between your comb and hair over...
 20.5CQ: In cars, one battery terminal is connected to the metal body. How d...
 20.5PE: A large lightning bolt had a 20,000A current and moved 30.0 C of c...
 20.6CQ: Why isn’t a bird sitting on a highvoltage power line electrocuted?...
 20.6PE: The 200A current through a spark plug moves 0.300 mC of charge. Ho...
 20.7CQ: The IR drop across a resistor means that there is a change in poten...
 20.7PE: (a) A defibrillator sends a 6.00A current through the chest of a p...
 20.8CQ: How is the IR drop in a resistor similar to the pressure drop in a ...
 20.8PE: During openheart surgery, a defibrillator can be used to bring a p...
 20.9CQ: In which of the three semiconducting materials listed in Table 20.1...
 20.9PE: (a) A defibrillator passes 12.0 A of current through the torso of a...
 20.10PE: A clock battery wears out after moving 10,000 C of charge through t...
 20.11CQ: If aluminum and copper wires of the same length have the same resis...
 20.11PE: The batteries of a submerged nonnuclear submarine supply 1000 A at...
 20.12CQ: Explain why R = R0 (1 + ??T) for the temperature variation of the r...
 20.12PE: Electron guns are used in Xray tubes. The electrons are accelerate...
 20.13CQ: Why do incandescent lightbulbs grow dim late in their lives, partic...
 20.13PE: A large cyclotron directs a beam of He++ nuclei onto a target with ...
 20.14CQ: The power dissipated in a resistor is given by P = V 2 / R , which ...
 20.14PE: Repeat the above example on Example 20.3, but for a wire made of si...
 20.15CQ: Give an example of a use of AC power other than in the household. S...
 20.15PE: Using the results of the above example on Example 20.3, find the dr...
 20.16CQ: Why do voltage, current, and power go through zero 120 times per se...
 20.16PE: A 14gauge copper wire has a diameter of 1.628 mm. What magnitude c...
 20.17CQ: You are riding in a train, gazing into the distance through its win...
 20.17PE: SPEAR, a storage ring about 72.0 m in diameter at the Stanford Line...
 20.18CQ: Using an ohmmeter, a student measures the resistance between variou...
 20.18PE: What current flows through the bulb of a 3.00V flashlight when its...
 20.19CQ: What are the two major hazards of electricity?
 20.19PE: Calculate the effective resistance of a pocket calculator that has ...
 20.20CQ: Why isn’t a short circuit a shock hazard?
 20.20PE: What is the effective resistance of a car’s starter motor when 150 ...
 20.21CQ: What determines the severity of a shock? Can you say that a certain...
 20.21PE: How many volts are supplied to operate an indicator light on a DVD ...
 20.22CQ: An electrified needle is used to burn off warts, with the circuit b...
 20.22PE: (a) Find the voltage drop in an extension cord having a 0.0600 ? r...
 20.23CQ: Some surgery is performed with highvoltage electricity passing fro...
 20.23PE: A power transmission line is hung from metal towers with glass insu...
 20.24CQ: Some devices often used in bathrooms, such as hairdryers, often hav...
 20.24PE: . What is the resistance of a 20.0mlong piece of 12gauge copper ...
 20.25CQ: We are often advised to not flick electric switches with wet hands,...
 20.25PE: The diameter of 0gauge copper wire is 8.252 mm. Find the resistanc...
 20.26CQ: Before working on a power transmission line, linemen will touch the...
 20.26PE: If the 0.100mm diameter tungsten filament in a light bulb is to ha...
 20.27CQ: Why is the resistance of wet skin so much smaller than dry, and why...
 20.27PE: Find the ratio of the diameter of aluminum to copper wire, if they ...
 20.28CQ: Could a person on intravenous infusion (an IV) be microshock sensit...
 20.28PE: What current flows through a 2.54cmdiameter rod of pure silicon t...
 20.29CQ: In view of the small currents that cause shock hazards and the larg...
 20.29PE: (a) To what temperature must you raise a copper wire, originally at...
 20.30PE: A resistor made of Nichrome wire is used in an application where it...
 20.31CQ: Define depolarization, repolarization, and the action potential.
 20.31PE: Of what material is a resistor made if its resistance is 40.0% grea...
 20.32CQ: Explain the properties of myelinated nerves in terms of the insulat...
 20.32PE: An electronic device designed to operate at any temperature in the ...
 20.33PE: (a) Of what material is a wire made, if it is 25.0 m long with a 0....
 20.34PE: Assuming a constant temperature coefficient of resistivity, what is...
 20.35PE: A wire is drawn through a die, stretching it to four times its orig...
 20.36PE: A copper wire has a resistance of 0.500 ? at 20.0ºC , and an iron w...
 20.37PE: (a) Digital medical thermometers determine temperature by measuring...
 20.38PE: Integrated Concepts(a) Redo Exercise 20.25 taking into account the ...
 20.39PE: Unreasonable Results (a) To what temperature must you raise a resis...
 20.40PE: What is the power of a 1.00×102 MV lightning bolt having a current ...
 20.41PE: What power is supplied to the starter motor of a large truck that d...
 20.42PE: A charge of 4.00 C of charge passes through a pocket calculator’s s...
 20.43PE: How many watts does a flashlight that has 6.00×102 C pass through i...
 20.44PE: Find the power dissipated in each of these extension cords: (a) an ...
 20.45PE: Verify that the units of a voltampere are watts, as implied by the...
 20.46PE: Show that the units 1 V2 / ? = 1W , as implied by the equation P = ...
 20.47PE: Show that the units 1 A2 ? ? = 1 W , as implied by the equation P =...
 20.48PE: Verify the energy unit equivalence that 1 kW ? h = 3.60 × 106 J .
 20.49PE: Electrons in an Xray tube are accelerated through 1.00 × 102 kV an...
 20.50PE: An electric water heater consumes 5.00 kW for 2.00 h per day. What ...
 20.51PE: With a 1200W toaster, how much electrical energy is needed to make...
 20.52PE: What would be the maximum cost of a CFL such that the total cost (i...
 20.53PE: Some makes of older cars have 6.00V electrical systems. (a) What i...
 20.54PE: Alkaline batteries have the advantage of putting out constant volta...
 20.55PE: A cauterizer, used to stop bleeding in surgery, puts out 2.00 mA at...
 20.56PE: The average television is said to be on 6 hours per day. Estimate t...
 20.57PE: An old lightbulb draws only 50.0 W, rather than its original 60.0 W...
 20.58PE: 00gauge copper wire has a diameter of 9.266 mm. Calculate the powe...
 20.59PE: Integrated ConceptsCold vaporizers pass a current through water, ev...
 20.60PE: Integrated Concepts(a) What energy is dissipated by a lightning bol...
 20.61PE: Integrated ConceptsWhat current must be produced by a 12.0V batter...
 20.62PE: Integrated ConceptsHow much time is needed for a surgical cauterize...
 20.63PE: Integrated ConceptsHydroelectric generators (see Figure 20.43) at H...
 20.64PE: Integrated Concepts(a) Assuming 95.0% efficiency for the conversion...
 20.65PE: Integrated ConceptsA lightrail commuter train draws 630 A of 650V...
 20.66PE: Integrated Concepts (a) An aluminum power transmission line has a r...
 20.67PE: Integrated Concepts(a) An immersion heater utilizing 120 V can rais...
 20.68PE: Integrated Concepts(a) What is the cost of heating a hot tub contai...
 20.69PE: Unreasonable Results (a) What current is needed to transmit 1.00×10...
 20.70PE: Unreasonable Results (a) What current is needed to transmit 1.00 × ...
 20.71PE: Construct Your Own an electric immersion heater used to heat a cup ...
 20.72PE: (a) What is the hot resistance of a 25W light bulb that runs on 12...
 20.73PE: Certain heavy industrial equipment uses AC power that has a peak vo...
 20.74PE: A certain circuit breaker trips when the rms current is 15.0 A. Wha...
 20.75PE: Military aircraft use 400Hz AC power, because it is possible to de...
 20.76PE: A North American tourist takes his 25.0W, 120V AC razor to Europe...
 20.77PE: In this problem, you will verify statements made at the end of the ...
 20.78PE: A small officebuilding air conditioner operates on 408V AC and co...
 20.79PE: What is the peak power consumption of a 120V AC microwave oven tha...
 20.80PE: What is the peak current through a 500W room heater that operates ...
 20.81PE: Two different electrical devices have the same power consumption, b...
 20.82PE: Nichrome wire is used in some radiative heaters. (a) Find the resis...
 20.83PE: Find the time after t = 0 when the instantaneous voltage of 60Hz A...
 20.84PE: (a) At what two times in the first period following t = 0 does the ...
 20.85PE: (a) How much power is dissipated in a short circuit of 240V AC thr...
 20.86PE: What voltage is involved in a 1.44kW short circuit through a 0.100...
 20.87PE: Find the current through a person and identify the likely effect on...
 20.88PE: While taking a bath, a person touches the metal case of a radio. Th...
 20.89PE: Foolishly trying to fish a burning piece of bread from a toaster wi...
 20.90PE: (a) During surgery, a current as small as 20.0 ?A applied directly ...
 20.91PE: (a) What is the resistance of a 220V AC short circuit that generat...
 20.92PE: A heart defibrillator passes 10.0 A through a patient’s torso for 5...
 20.93PE: Integrated Concepts A short circuit in a 120V appliance cord has a...
 20.94PE: Construct Your Own a person working in an environment where electri...
 20.95PE: Integrated Concepts Use the ECG in Figure 20.34 to determine the he...
 20.96PE: Integrated Concepts (a) Referring to Figure 20.34, find the time sy...
Solutions for Chapter 20: College Physics 1st Edition
Full solutions for College Physics  1st Edition
ISBN: 9781938168000
Solutions for Chapter 20
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Solutions for Chapter 20
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This textbook survival guide was created for the textbook: College Physics , edition: 1. College Physics was written by and is associated to the ISBN: 9781938168000. Chapter 20 includes 126 full stepbystep solutions. Since 126 problems in chapter 20 have been answered, more than 762743 students have viewed full stepbystep solutions from this chapter. This expansive textbook survival guide covers the following chapters and their solutions.
Key Physics Terms and definitions covered in this textbook

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parallel

any symbol
average (indicated by a bar over a symbol—e.g., v¯ is average velocity)

°C
Celsius degree

°F
Fahrenheit degree