University Physics Volume 2
18th Edition
ISBN: 9781938168161
Author: OpenStax
Publisher: OpenStax
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Textbook Question
Chapter 9, Problem 86CP
Consider a square rod of material with sides of length L = 3.00 cm with a current density of
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Chapter 9 Solutions
University Physics Volume 2
Ch. 9 - Check Your Understanding Handheld calculators...Ch. 9 - Check Your Understanding Circuit breakers in a...Ch. 9 - Check Your Understanding In Example 9.4, the drift...Ch. 9 - Check Your Understanding The current density is...Ch. 9 - Check Your Understanding Copper wires use...Ch. 9 - Check Your Understanding A strain gauge is an...Ch. 9 - Check Your Understanding The resistance between...Ch. 9 - Check Your Understanding The voltage supplied to...Ch. 9 - Check Your Understanding Electric motors have a...Ch. 9 - Check Your Understanding Is the efficiency of the...
Ch. 9 - Can a wire cany a current and still be...Ch. 9 - Car batteries are rated in ampere-hours (Ah). To...Ch. 9 - When working with high-power electric circuits, it...Ch. 9 - Incandescent light bulbs are being replaced with...Ch. 9 - It was stated that the motion of an electron...Ch. 9 - Electric circuits are sometimes explained using a...Ch. 9 - An incandescent light bulb is partially evacuated....Ch. 9 - The [R drop across a resistor means that there is...Ch. 9 - Do impurities in semiconducting materials listed...Ch. 9 - Does the resistance of an object depend on the...Ch. 9 - If aluminum and copper wires of the same length...Ch. 9 - In Determining Field from Potential, resistance...Ch. 9 - Shown below are the results of an experiment where...Ch. 9 - The current I is measured through a sample of an...Ch. 9 - Common household appliances are rated at 110 V,...Ch. 9 - Your electric bill gives your consumption in units...Ch. 9 - Resistors are commonly rated at 18W,14W,12W ,1 W...Ch. 9 - Ail immersion heater is a small appliance used to...Ch. 9 - What requirement for superconductivity7 makes...Ch. 9 - Name two applications for superconductivity listed...Ch. 9 - A Van de Graaff generator is one of the original...Ch. 9 - A cathode ray tube (CRT) is a device that produces...Ch. 9 - How many electrons flow through a point in a wire...Ch. 9 - A conductor carries a current that is decreasing...Ch. 9 - The quantity of charge through a conductor is...Ch. 9 - The current through a conductor is modeled as...Ch. 9 - The charge on a capacitor in a circuit is modeled...Ch. 9 - An aluminum wire 1.628 mm in diameter (14-gauge)...Ch. 9 - The current of an election beam has a...Ch. 9 - A high-energy proton accelerator produces a proton...Ch. 9 - Consider a wire of a circular cross-section with a...Ch. 9 - The current of an electron beam has a measured...Ch. 9 - The current supplied to an ail conditioner unit is...Ch. 9 - What current flows through the bulb of a 3.00-V...Ch. 9 - Calculate the effective resistance of a pocket...Ch. 9 - How many volts are supplied to operate an...Ch. 9 - What is the resistance of a 20.0-m-long piece of...Ch. 9 - The diameter of 0-gauge copper wire is 8.252 mm....Ch. 9 - If the 0. 10.0-mm-diameter tungsten filament in a...Ch. 9 - A lead rod has a length of 30.00 cm and a...Ch. 9 - Find the ratio of the diameter of aluminum to...Ch. 9 - What current flows through a 2.54-cm-diameter rod...Ch. 9 - (a) To what temperature must you raise a copper...Ch. 9 - A resistor made of nichrome wire is used in an...Ch. 9 - Of what material is a resistor made if its...Ch. 9 - An electronic device designed to operate at any...Ch. 9 - (a) Of what material is a wire made, if it is 25.0...Ch. 9 - Assuming a constant temperature coefficient of...Ch. 9 - A copper wire has a resistance of 0.500 at 20.0°C...Ch. 9 - A 2.2-k resistor is connected across a D cell...Ch. 9 - A resistor rated at 250 k is connected across two...Ch. 9 - A resistor is connected in series with a power...Ch. 9 - A resistor is placed in a circuit with an...Ch. 9 - The following table show the measurements of a...Ch. 9 - A 20.00-V battery is used to supply current to a...Ch. 9 - What is the maximum voltage that can be applied to...Ch. 9 - A heater is being designed that uses a coil of...Ch. 9 - An alternative to CFL bulbs and incandescent bulbs...Ch. 9 - The power dissipated by a resistor with a...Ch. 9 - Running late to catch a plane, a driver...Ch. 9 - SI. A physics student has a single-occupancy dorm...Ch. 9 - A 0.50-W, 220- resistor carries the...Ch. 9 - Consider a power plant is located 60 km away from...Ch. 9 - A wire is drawn through a die, stretching it to...Ch. 9 - Digital medical thermometers determine temperature...Ch. 9 - Electrical power generators are sometimes "load...Ch. 9 - A 12-guage gold wire has a length of 1 meter. (a)...Ch. 9 - What is the change in temperature required to...Ch. 9 - A coaxial cable consists of an inner conductor...Ch. 9 - A 10.00-meter long wire cable that is made of...Ch. 9 - A nichrome rod that is 3.00 mm long with a cross...Ch. 9 - The temperature in Philadelphia, PA can vary...Ch. 9 - When 100.0 V is applied across a 5-gauge (diameter...Ch. 9 - A wire with a resistance of 5.0 is drawn out...Ch. 9 - What is the resistivity of a wire of 5-gauge wire...Ch. 9 - Coils are often used in electrical and electronic...Ch. 9 - Currents of approximately 0.06 A can be...Ch. 9 - A 20.00-ohm; 5.00-watt resistor is placed in...Ch. 9 - A battery with an emf of 24.00 V delivers a...Ch. 9 - A 12.00-V battery has an internal resistance of a...Ch. 9 - A 10-gauge copper wire has a cross-sectional area...Ch. 9 - The current through a 12-gauge wire is given as...Ch. 9 - A particle accelerator produces a beam with a...Ch. 9 - In this chapter, most examples and problems...Ch. 9 - A current of I= 25A is drawn from a 100-V...Ch. 9 - Consider a square rod of material with sides of...Ch. 9 - A resistor of an unknown resistance is placed in...Ch. 9 - The charge that flows through a point in a wire as...Ch. 9 - Consider a resistor made from a hollow cylinder of...Ch. 9 - What is the current through a cylindrical wire of...Ch. 9 - A student uses a 100.00-W, 115.00-V radiant heater...Ch. 9 - A 12-V car battery is used to power a 20.00-W,...Ch. 9 - A physics student uses a 115.00-V immersion heater...
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- The current in a wire varies with time according to the equation I(t) = 6.00 A + (4.80 A/s)t, where t is in seconds. How many coulombs of charge pass a cross section of the wire in the time period between t = 0.00 s and t = 3.00 s? Select one: a. 13 C b. 21 C c. 72 C d. 39.6 Carrow_forwardA positive charge moves near a very long wire carrying a current as shown. If the 3.1 C charge moves at 9×105 m/s and is 11 cm away from the 7 A current in the long wire, what is the magnitude of the force on the charge? (in N) 1.26 3.55×101 1.95×107 1.12×102arrow_forwardA positive charge moves near a very long wire carrying a current as shown. If the 3.1 C charge moves at 9×105 m/s and is 11 cm away from the 7 A current in the long wire, what is the magnitude of the force on the charge? (in N)(a) 1.26(b) 3.55×101(c) 1.95×107(d) 1.12×102arrow_forward
- Consider two current-carrying wires, separated by a distance d = 4.9 cm, as shown in the figure. The left wire is directed out of the page with current I1, and the right wire is directed into the page with current I2. The point P is a distance d from both wires, so the wires and the point form an equilateral triangle. If the current from the first wire is 7.5 A and the current from the second is 15 A, what is the magnitude of the magnetic field, in tesla, at point P?arrow_forwardA wire carries a steady current of 3.6 A over a period of 1 hr. What total charge moves through the wire in this time interval? Group of answer choices 7.18 x 10^4 C 1.29 x 10^4 C 6.85 x 10^4 C 9.39 x 10^4 Carrow_forwardThe figure below is a cross-sectional view of a coaxial cable. The center conductor is surrounded by a rubber layer, an outer conductor, and another rubber layer. In a particular application, the current in the inner conductor is I1 = 1.12 A out of the page and the current in the outer conductor is I2 = 3.04 A into the page. Assuming the distance d = 1.00 mm, answer the following.arrow_forward
- The figure below represents a section of a circular conductor of nonuniform diameter carrying a current of I = 4.00 A. The radius of cross-section A1 is r1 = 0.480 cm. An illustration shows a horizontal cylindrical conductor of nonuniform diameter such that the radius of the left face of the cylinder, r1, is less than the radius of the right face of the cylinder, r2. Similarly the area A1 of the left face of the cylinder is less than the area of the right face of the cylinder, A2. The current is shown to flow rightward and horizontal, as represented by the arrow I. (a) What is the magnitude of the current density across A1? A/m2 The radius r2 at A2 is larger than the radius r1 at A1. (b) Is the current at A2 larger, smaller, or the same? The current is larger.The current is smaller. The current is the same. (c) Is the current density at A2 larger, smaller, or the same? The current density is larger.The current density is smaller. The current density is the same. Assume A2 =…arrow_forwardGiven the current through a point to be i(t) = 5.66 cos( 2.3 t), in amperes, determine the total amount of charge, in coulombs, flowing through the said point during the time interval 2.34 s < t < 6.09 s.arrow_forwardIf a metal wire carries a current of 29.0 mA,how long does it take for 7.60×1020 electronsto pass a given cross-sectional area anywherealong the wire? The fundamental charge is1.602 × 10−19 C.Answer in units of s.arrow_forward
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