College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Chapter 19, Problem 30P
Mass m = 1.00 kg is suspended vertically at rest by an insulating string connected to a circuit partially immersed in a magnetic field as in Figure P19.30. The magnetic field has magnitude Bin = 2.00 T and the length ℓ = 0.500 m. (a) Find the current I. (b) If ε = 115 V, find the required resistance R.
Figure P19.30
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Chapter 19 Solutions
College Physics
Ch. 19.3 - A charged particle moves in a straight line...Ch. 19.3 - The north-pole end of a bar magnet is held near a...Ch. 19.5 - As a charged particle moves freely in a circular...Ch. 19.6 - A square and a circular loop with the same area...Ch. 19.8 - Which of the following actions would double the...Ch. 19.8 - Prob. 19.6QQCh. 19 - Prob. 1CQCh. 19 - Prob. 2CQCh. 19 - How can the motion of a charged particle be used...Ch. 19 - Prob. 4CQ
Ch. 19 - The following statements are related to the force...Ch. 19 - Will a nail be attracted to either pole of a...Ch. 19 - Figure CQ19.7 shows a coaxial cable carrying...Ch. 19 - A magnet attracts a piece of iron. The iron can...Ch. 19 - Figure CQ19.9 shows four positive charges, A, B,...Ch. 19 - Is the magnetic field created by a current loop...Ch. 19 - Suppose you move along a wire at the same speed as...Ch. 19 - Why do charged particles from outer space, called...Ch. 19 - A hanging Slinky toy is attached to a powerful...Ch. 19 - How can a current loop he used to determine the...Ch. 19 - Prob. 15CQCh. 19 - Figure CQ19.16 shows four permanent magnets, each...Ch. 19 - Two charged particles are projected in the same...Ch. 19 - Prob. 18CQCh. 19 - A magnetic field exerts a torque on each of the...Ch. 19 - Consider an electron near the Earths equator. In...Ch. 19 - (a) Find the direction of the force on a proton (a...Ch. 19 - Find the direction of the magnetic field acting on...Ch. 19 - Prob. 4PCh. 19 - A laboratory electromagnet produces a magnetic...Ch. 19 - Prob. 6PCh. 19 - Electrons and protons travel from the Sun to the...Ch. 19 - An oxygen ion (O+) moves in the xy-plane with a...Ch. 19 - A proton moving at 4.00 106 m/s through a...Ch. 19 - Sodium ions (Na+) move at 0.851 m/s through a...Ch. 19 - At the equator, near the surface of Earth, the...Ch. 19 - A proton travels with a speed of 5.02 106 m/s at...Ch. 19 - An electron moves in a circular path perpendicular...Ch. 19 - Figure P19.14a is a diagram of a device called a...Ch. 19 - Prob. 15PCh. 19 - A mass spectrometer is used to examine the...Ch. 19 - Jupiters magnetic field occupies a volume of space...Ch. 19 - Electrons in Earths upper atmosphere have typical...Ch. 19 - Prob. 19PCh. 19 - A proton (charge +e, mass mp), a deuteron (charge...Ch. 19 - A particle passes through a mass spectrometer as...Ch. 19 - In Figure P19.2, assume in each case the velocity...Ch. 19 - A current I = 15 A is directed along the positive...Ch. 19 - A straight wire carrying a 3.0-A current is placed...Ch. 19 - In Figure P19.3, assume in each case the velocity...Ch. 19 - A wire having a mass per unit length of 0.500 g/cm...Ch. 19 - A wire carries a current of 10.0 A in a direction...Ch. 19 - At a certain location, Earth has a magnetic field...Ch. 19 - A wire with a mass of 1.00 g/cm is placed on a...Ch. 19 - Mass m = 1.00 kg is suspended vertically at rest...Ch. 19 - Consider the system pictured in Figure P19.31. A...Ch. 19 - A metal rod of mass m carrying a current I glides...Ch. 19 - In Figure P19.33, the cube is 40.0 cm on each...Ch. 19 - A horizontal power line of length 58 m carries a...Ch. 19 - A wire is formed into a circle having a diameter...Ch. 19 - A current of 17.0 mA is maintained in a single...Ch. 19 - An eight-turn coil encloses an elliptical area...Ch. 19 - A current-carrying rectangular wire loop with...Ch. 19 - A 6.00-turn circular coil of wire is centered on...Ch. 19 - The orientation of small satellites is often...Ch. 19 - Along piece of wire with a mass of 0.100 kg and a...Ch. 19 - A rectangular loop has dimensions 0.500 m by 0.300...Ch. 19 - A lightning bolt may carry a current of 1.00 104...Ch. 19 - A long, straight wire going through the origin is...Ch. 19 - Neurons in our bodies carry weak currents that...Ch. 19 - In 1962 measurements of the magnetic field of a...Ch. 19 - A cardiac pacemaker can be affected by a static...Ch. 19 - The two wires shown in Figure P19.48 are separated...Ch. 19 - Prob. 49PCh. 19 - Two long, parallel wires carry currents of I1 =...Ch. 19 - Two long, parallel wires carry currents of I1 =...Ch. 19 - Prob. 52PCh. 19 - The magnetic field 40.0 cm away from a long,...Ch. 19 - Prob. 54PCh. 19 - Prob. 55PCh. 19 - Prob. 56PCh. 19 - A wire with a weight per unit length of 0.080 N/m...Ch. 19 - In Figure P19.58 the current in the long, straight...Ch. 19 - A long solenoid that has 1.00 103 turns uniformly...Ch. 19 - Prob. 60PCh. 19 - It is desired to construct a solenoid that will...Ch. 19 - Certain experiments must be performed in the...Ch. 19 - Ail electron is moving at a speed of 1.0 104 in/s...Ch. 19 - Figure P19.64 is a setup that can be used to...Ch. 19 - Two coplanar and concentric circular loops of wire...Ch. 19 - An electron moves in a circular path perpendicular...Ch. 19 - Prob. 67APCh. 19 - A 0.200-kg metal rod carrying a current of 10.0 A...Ch. 19 - Using an electromagnetic flowmeter (Fig. P19.69),...Ch. 19 - A uniform horizontal wire with a linear mass...Ch. 19 - Prob. 71APCh. 19 - Two long, parallel wires, each with a mass per...Ch. 19 - Protons having a kinetic energy of 5.00 MeV are...Ch. 19 - A straight wire of mass 10.0 g and length 5.0 cm...Ch. 19 - A 1.00-kg ball having net charge Q = 5.00 C is...Ch. 19 - Two long, parallel conductors separated by 10.0 cm...
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- A circuit consists of a conducting movable bar and a light bulb connected to two conducting rails as shown in Figure OQ23.16. An external magnetic field is directed perpendicular to the plane of the circuit. Which of the following actions will make the bulb light up? More than one statement may be correct. (a) The bar is moved to the left. (b) The bar is moved to the right. (c) The magnitude of the magnetic field is increased. (d) The magnitude of the magnetic field is decreased. (e) The bar is lifted off the rails.arrow_forwardA rectangular coil consists of N = 100 closely wrapped turns and has dimensions a = 0.400 m and b = 0.300 m. The coil is hinged along the y axis, and its plane makes an angle = 30.0 with the x axis (Fig. P22.25). (a) What is the magnitude of the torque exerted on the coil by a uniform magnetic field B = 0.800 T directed in the positive x direction when the current is I = 1.20 A in the direction shown? (b) What is the expected direction of rotation of the coil? Figure P22.25arrow_forwardFigure P23.15 shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 6.00 , and a 2.50-T magnetic field is directed perpendicularly downward, into the paper. Let = 1.20 m. (a) Calculate the applied force required to move the bar to the right at a constant speed of 2.00 m/s. (b) At what rate is energy delivered to the resistor? Figure P23.15 Problems 15 through 18.arrow_forward
- A wire carrying a current I is bent into the shape of an exponential spiral, r = e, from = 0 to = 2 as suggested in Figure P29.47. To complete a loop, the ends of the spiral are connected by a straight wire along the x axis. (a) The angle between a radial line and its tangent line at any point on a curve r = f() is related to the function by tan=rdr/d Use this fact to show that = /4. (b) Find the magnetic field at the origin. Figure P29.47arrow_forwardWhy is the following situation impossible? A conducting rectangular loop of mass M = 0.100 kg, resistance R = 1.00 , and dimensions w = 50.0 cm by = 90.0 cm is held with its lower edge just above a region with a uniform magnetic field of magnitude B = 1.00 T as shown in Figure P30.34. The loop is released from rest. Just as the top edge of the loop reaches the region containing the field, the loop moves with a speed 4.00 m/s. Figure P30.34arrow_forwardReview. Figure P31.31 shows a bar of mass m = 0.200 kg that can slide without friction on a pair of rails separated by a distance = 1.20 m and located on an inclined plane that makes an angle = 25.0 with respect to the ground. The resistance of the resistor is R = 1.00 and a uniform magnetic field of magnitude B = 0.500 T is directed downward, perpendicular to the ground, over the entire region through which the bar moves. With what constant speed v does the bar slide along the rails?arrow_forward
- The bar in Figure OQ23.10 moves on rails to the right with a velocity v, and a uniform, constant magnetic field is directed out of the page. Which of the following statements are correct? More than one statement may be correct. (a) The induced current in the loop is zero. (b) The induced current in the loop is clockwise. (c) The induced current in the loop is counterclockwise. (d) An external force is required to keep the bar moving at constant speed. (e) No force is required to keep the bar moving at constant speed.arrow_forwardA Figure P32.74 shows an N-turn rectangular coil of length a and width b entering a region of uniform magnetic field of magnitude Bout directed out of the page. The velocity of the coil is constant and is upward in the figure. The total resistance of the coil is R. What are the magnitude and direction of the magnetic force on the coil a. when only a portion of the coil has entered the region with the field, b. when the coil is completely embedded in the field, and c. as the coil begins to exit the region with the field?arrow_forward
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