Problem 1CQ: In Figure Q24.1, suppose the magnet on the right is fixed in place and the magnet on the left is... Problem 2CQ: You have a bar magnet whose poles are not marked. How can you find which pole is north and which is... Problem 3CQ: When you are in the southern hemisphere, does a compass point north or south? Problem 4CQ: If you were standing directly at the earths north magnetic pole, in what direction would a compass... Problem 5CQ: If you took a sample of magnetotactic bacteria from the northern hemisphere to the southern... Problem 6CQ: Green turtles use the earths magnetic field to navigate. They seem to use the field to tell them... Problem 7CQ Problem 8CQ Problem 9CQ Problem 10CQ: As shown in Figure Q24.10, a uniform magnetic field points upward, in the plane of the paper. A long... Problem 11CQ Problem 12CQ: An electron is moving in a circular orbit in a uniform magnetic field. Is the kinetic energy of the... Problem 13CQ Problem 14CQ: One long solenoid is placed inside another solenoid. Both solenoids have the same length and the... Problem 15CQ Problem 16CQ Problem 17CQ Problem 18CQ Problem 19CQ: An electron is moving near a long, current-carrying wire, as shown in Figure Q24.19. What is the... Problem 20CQ: Two positive charges are moving in a uniform magnetic field with velocities as shown in Figure... Problem 21CQ: An electron is moving in a circular orbit in the earths magnetic field directly above the north... Problem 22CQ: An electron and a proton are moving in circular orbits in the earths magnetic field, high above the... Problem 23CQ: A proton moves in a region of uniform magnetic field, as shown in Figure Q24.23. The velocity at one... Problem 24CQ Problem 25CQ Problem 26CQ: A long wire and a square loop lie in the plane of the paper. Both carry a current in the direction... Problem 27CQ: A solenoid carries a current that produces a field inside it. A wire carrying a current lies inside... Problem 29MCQ: An unmagnetized metal sphere hangs by a thread. When the north pole of a bar magnet is brought near,... Problem 30MCQ: If a compass is placed above a current-carrying wire, as in Figure Q24.30, the needle will line up... Problem 31MCQ Problem 32MCQ: Figure Q24.32 shows four particles moving to the right as they enter a region of uniform magnetic... Problem 33MCQ: Four particles of identical charge and mass enter a region of uniform magnetic field and follow the... Problem 34MCQ: If all of the particles shown in Figure Q24.33 are electrons, what is the direction of the magnetic... Problem 35MCQ: If two compasses are brought near enough to each other, the magnetic fields of the compasses... Problem 1P: Table 24.1 notes that the magnetic field 10 cm from a wire carrying a 1 A current is 2T. What is the... Problem 2P: Use the data from Table 24.1 to determine at what approximate distance from a wire carrying a... Problem 3P: The magnetic field at the center of a 1.0-cm-diameter loop is 2.5 mT. a. What is the current in the... Problem 4P: For a particular scientific experiment, it is important to be completely isolated from any magnetic... Problem 5P Problem 7P: An investigator places a sample 1.0 cm from a wire carrying a large current; the strength of the... Problem 8P: Although the evidence is weak, there has been concern in recent years over possible health effects... Problem 9P: Some consumer groups urge pregnant women not to use electric blankets, in case there is a health... Problem 10P: A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x = 2.0... Problem 11P: The element niobium, which is a metal, is a superconductor (i.e., no electrical resistance) at... Problem 12P: The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. A... Problem 13P: A solenoid used to produce magnetic fields for research purposes is 2.0 m long, with an inner radius... Problem 14P: Two concentric current loops lie in the same plane. The smaller loop has a radius of 3.0 cm and a... Problem 15P: The magnetic field of the brain has been measured to be approximately 30 1012 T. Although the... Problem 16P Problem 17P: What is the magnetic field at the center of the loop in Figure P24.17? Figure P24.17 Problem 18P: Experimental tests have shown that hammerhead sharks can detect magnetic fields. In one such test,... Problem 19P Problem 20P: You have a 1.0-m-long copper wire. You want to make an N-turn current loop that generates a 1.0 mT... Problem 21P: In the Bohr model of the hydrogen atom, the electron moves in a circular orbit of radius 5.3 1011 m... Problem 22P: A proton moves with a speed of 1.0 107 m/s in the directions shown in Figure P24.22. A0.50 T... Problem 23P: An electron moves with a speed of 1.0 107 m/s in the directions shown in Figure P24.23. A0.50 T... Problem 24P: An electromagnetic flowmeter applies a magnetic field of 0.20 T to blood flowing through a coronary... Problem 25P: The aurora is caused when electrons and protons, moving in the earths magnetic Held of 5.0 105 T,... Problem 26P: Problem 24.25 describes two particles that orbit the earths magnetic field lines. What is the... Problem 27P Problem 28P: Charged particles orbit magnetic field lines in the space above Mars just as they do in the space... Problem 29P: The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons... Problem 30P: A cyclotron is used to produce a beam of high-energy deuterons that then collide with a target to... Problem 31P: A medical cyclotron used in the production of medical isotopes accelerates protons to 6.5 MeV. The... Problem 32P: Early black-and-white television sets used an electron beam to draw a picture on the screen. The... Problem 33P Problem 34P Problem 35P Problem 36P: A uniform 2.5 T magnetic field points to the right. A 3.0-m-long wire, carrying 15 A, is placed at... Problem 37P Problem 38P: A current loop in a motor has an area of 0.85 cm2. It carries a 240 mA current in a uniform field of... Problem 39P: A square current loop 5.0 cm on each side carries a 500 mA current. The loop is in a 1.2 T uniform... Problem 40P: People have proposed driving motors with the earths magnetic field. This is possible in principle,... Problem 41P: a. What is the magnitude of the torque on the circular current loop in Figure P24.41? b. What is the... Problem 42P Problem 43P: A solenoid is near a piece of iron, as shown in Figure P24.43. When a current is present in the... Problem 44GP: The right edge of the circuit in Figure P24.44 extends into a 50 mT uniform magnetic field. What are... Problem 45GP Problem 46GP: An electron travels with speed 1.0 107 m/s between the two parallel charged plates shown in Figure... Problem 47GP Problem 48GP: A device called a railgun uses the magnetic force on currents to launch projectiles at very high... Problem 49GP: Irrigation channels that require regular flow monitoring are often equipped with electromagnetic... Problem 50GP: Typical blood velocities in the coronary arteries range from 10 to 30 cm/s. An electromagnetic... Problem 51GP: A power line consists of two wires, each carrying a current of 400 A in the same direction. The... Problem 52GP: Consider the long rectangular loop in Figure P24.52. If you pass a 1 A current through the loop,... Problem 53GP: Bats are capable of navigating using the earths fielda plus for an animal that may fly great... Problem 54GP: At the equator, the earths field is essentially horizontal; near the north pole, it is nearly... Problem 56GP: A 1.0-m-long, 1.0-mm-diaraeter copper wire carries a current of 50.0 A to the cast. Suppose we... Problem 57GP: An insulated copper wire is wrapped around an iron nail. The resulting coil of wire consists of 240... Problem 59MSPP: Assuming the particle in Figure P24.59 is positively charged, what are the directions of the forces... Problem 60MSPP: How does the kinetic energy of the particle in Figure P24.59 change as it traverses the velocity... Problem 61MSPP Problem 62MSPP: Next, a particle with the same mass and velocity as the particle in Figure P24.59 enters the... Problem 63MSPP: What is the direction of the magnetic force on a singly ionized negative chlorine ion moving in this... Problem 64MSPP: What is the magnitude of the force on this ion? A. 2.8 1023 N B. 2.4 1023 N C. 1.6 1023 N D. 1.4 ... Problem 65MSPP: What magnitude electric field is necessary to exactly balance this magnetic force? A. 1.8 104 N/ C... Problem 66MSPP: The electric field produces a potential difference. If you place one electrode 10 m below the... Problem 67MSPP: In the spectrometer shown in Figure P24.67, do the ions have positive or negative charge? A.... Problem 68MSPP: The moving ions can be thought of as a current loop, and it will produce its own magnetic field. The... Problem 69MSPP: Why is it important that the ions have a known speed? A. The radius of the orbit depends on the... Problem 70MSPP: A mass spectrometer similar to the one in Figure P24.67 is designed to analyze biological samples.... format_list_bulleted