College Physics Volume 1 (Chs. 1-16); Mastering Physics with Pearson eText -- ValuePack Access Card -- for College Physics (10th Edition)
10th Edition
ISBN: 9780134151779
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 91PP
BIO Studying magnetic bacteria. Some types of bacteria contain chains of ferromagnetic particles parallel to their long axis. The chains act like small bar magnets that align these magnetotactic bacteria with the earth’s magnetic field. In one experiment to study the response of such bacteria to magnetic fields, a solenoid is constructed with copper wire, 1.0 mm in diameter, evenly wound in a single layer to form a helical coil of length 40 cm and diameter 12 cm. The wire has a very thin layer of insulation, and the coil is wound so that adjacent turns are just touching. The solenoid, which generates a magnetic field, is in an enclosure that shields it from other magnetic fields. A sample of magnetotactic bacteria is placed inside the solenoid. The torque on an individual bacterium in the solenoid’s magnetic field is proportional to the magnitude of the magnetic field and to the sine of the angle between the long axis of the bacterium and the magnetic-field direction.
91. The solenoid is removed from the enclosure and then used in a location where the earth's magnetic field is 50 μT and points horizontally. A sample of bacteria is placed in the center of the solenoid, and the same current is applied that produced a magnetic field of 150 μT in the lab. Describe the field experienced by the bacteria. The field
- A. is still 150 μT.
- B. is now 200 μT.
- C. is between 100 and 200 μT, depending on how the solenoid is oriented.
- D. is between 50 and 150 μT, depending on how the solenoid is oriented.
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Chapter 20 Solutions
College Physics Volume 1 (Chs. 1-16); Mastering Physics with Pearson eText -- ValuePack Access Card -- for College Physics (10th Edition)
Ch. 20 - If an electron beam in a cathode-ray tube travels...Ch. 20 - Why is it not a good idea to call magnetic field...Ch. 20 - If the magnetic force does no work on a charged...Ch. 20 - A permanent magnet can be used to pick up a string...Ch. 20 - Streams of charged particles emitted from the sun...Ch. 20 - A student once proposed to obtain an isolated...Ch. 20 - The magnetic force on a moving charged particle is...Ch. 20 - The text discusses the magnetic field of an...Ch. 20 - Two parallel conductors carrying current in the...Ch. 20 - Household wires (such as lamp cords) often carry...
Ch. 20 - Can a charged particle move through a magnetic...Ch. 20 - Prob. 12CQCh. 20 - An electron traveling with a speed v enters a...Ch. 20 - A beam of protons is directed horizontally into...Ch. 20 - A wire carrying a current in the direction shown...Ch. 20 - A solenoid is connected to a battery as shown in...Ch. 20 - Two very long, straight, parallel wires carry...Ch. 20 - A light circular wire suspended by a thin silk...Ch. 20 - An electron is moving di'ectly toward you in a...Ch. 20 - Three particles having the same mass and the same...Ch. 20 - A metal bar connected by metal leads to the...Ch. 20 - A certain current produces a magnetic field 8 near...Ch. 20 - A coil is connected to a battery as shown in...Ch. 20 - A particle enters a uniform magnetic field...Ch. 20 - In a 1.25 T magnetic field directed vertically...Ch. 20 - An ion having charge +6e is traveling horizontally...Ch. 20 - A proton traveling at 3 60 km/s suddenly enters a...Ch. 20 - A particle having a mass of 0.195 g carries a...Ch. 20 - At a given instant, a particle with a mass of 5.00...Ch. 20 - If the magnitude of the magnetic force on a proton...Ch. 20 - A particle with mass 3 102 kg and charge +5 C...Ch. 20 - A particle with a charge of 2.50 108 C is moving...Ch. 20 - A particle with mass 1.81 103 kg and a charge of...Ch. 20 - Prob. 10PCh. 20 - Prob. 11PCh. 20 - An electron moves at 2.50 106 m/s through a...Ch. 20 - In a cloud chamber- experiment, 3 proton enters a...Ch. 20 - An alpha particle (a He nucleus, containing two...Ch. 20 - A deuteron particle (the nucleus of an isotope of...Ch. 20 - A beam of protons traveling at 1.20 km/s enters a...Ch. 20 - A uniform magnetic field bends an electron in a...Ch. 20 - 18. An electron at point A in Figure 20.59 has a...Ch. 20 - Prob. 19PCh. 20 - A 3.25 g bullet picks up an electric charge of...Ch. 20 - An electron travels into a 0.3 magnetic field...Ch. 20 - Prob. 22PCh. 20 - Singly ionized (one electron removed) atoms are...Ch. 20 - Ancient meat eating. The amount of meat in...Ch. 20 - A straight vertical wire carries a current of 1.20...Ch. 20 - Magnetic force on a lightning bolt. Currents...Ch. 20 - A horizontal rod 0.200 m long carries a current...Ch. 20 - A straight 2.5 m wire carries a typical household...Ch. 20 - A magnetic field is used to suspend a wire of mass...Ch. 20 - A rectangular 10.0 cm by 20.0 cm circuit carrying...Ch. 20 - A long wire carrying a 6.00 A current reverses...Ch. 20 - As long wire carrying 4.50 A or current makes two...Ch. 20 - The 20.0 cm by 35.0 cm rectangular circuit shown...Ch. 20 - Prob. 34PCh. 20 - A circular coil of wire 8.6 cm in diameter has 15...Ch. 20 - A coil having 165 turns and a radius of 1.2 cm...Ch. 20 - A circular coil of 50 loops and diameter 20.0 cm...Ch. 20 - You want to produce a magnetic field of magnitude...Ch. 20 - Household magnetic fields. Home circuit breakers...Ch. 20 - (a) How large a current would a very long,...Ch. 20 - Currents in the heart. The body contains many...Ch. 20 - Magnetic sensitivity of electric fish. Electric...Ch. 20 - A jumper cable is used to start a car that has a...Ch. 20 - If the magnetic field due to a long, straight,...Ch. 20 - A long, straight wire carries a current l0 and...Ch. 20 - EMF. Currents in dc transmission lines can be 100...Ch. 20 - A long, straight telephone cable contains six...Ch. 20 - Two insulated wires perpendicular to each other in...Ch. 20 - Two long straight parallel wires are 10.0 cm apart...Ch. 20 - Set Up: B=0l2r The direction of BB is given by the...Ch. 20 - Two high-current transmission lines carry currents...Ch. 20 - Prob. 52PCh. 20 - Prob. 53PCh. 20 - An electric bus operates by drawing current from...Ch. 20 - A circular metal loop is 22 cm in diameter, (a)...Ch. 20 - A closely wound circular coil with a diameter of...Ch. 20 - A closely wound circular coil has a radius of 6.00...Ch. 20 - BIO Currents in the brain. The magnetic field...Ch. 20 - A closely wound, circular coil with radius 2.40 cm...Ch. 20 - Two circular concentric loops of wire lie on a...Ch. 20 - Calculate the magnitude and direction of the...Ch. 20 - A solenoid contains 750 coils of very thin wire...Ch. 20 - As a new electrical technician, you are designing...Ch. 20 - A solenoid is designed to produce a 0.0279 T...Ch. 20 - As shown in Figure 20.67, a single circular...Ch. 20 - A solenoid that is 35 cm long and contains 450...Ch. 20 - You have 25 m of wire, which you want to use to...Ch. 20 - A toroidal solenoid (see Figure 20.42) has inner...Ch. 20 - Three long, straight electrical cables, running...Ch. 20 - A long, straight, cylindrical wire of radius R...Ch. 20 - Platinum is a paramagnetic metal having a relative...Ch. 20 - When a certain paramagnetic material is placed in...Ch. 20 - A 150 g ball containing 4.00 108 excess electrons...Ch. 20 - Magnetic balance. The circuit shown in Figure...Ch. 20 - A thin 50.0-cm-long metal bar with mass 750 g...Ch. 20 - 76. A long, straight wire containing a...Ch. 20 - A singly charged an of Li (on isotope of lithium...Ch. 20 - An insulated circular ring of diameter 6.50 cm...Ch. 20 - The effect of transmission lines. Two hikers are...Ch. 20 - DATA A current-carrying wife of length 0.15 m is...Ch. 20 - Two very long, straight wires carry currents as...Ch. 20 - Prob. 82GPCh. 20 - Prob. 83GPCh. 20 - Prob. 84GPCh. 20 - A long wire carrying 6.50 A of current makes two...Ch. 20 - BIO Magnetic fields and MRI. Magnetic resonance...Ch. 20 - Prob. 87PPCh. 20 - The large magnetic fields used in MRI can produce...Ch. 20 - BIO Studying magnetic bacteria. Some types of...Ch. 20 - To use a larger sample of bacteria, the...Ch. 20 - BIO Studying magnetic bacteria. Some types of...
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