Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 32, Problem 34SP
A copper disk of 10-cm radius is rotating at 20 rev/s about its central symmetry axis. The plane of the disk is perpendicular to a uniform magnetic field
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A 2-tesla uniform magnetic field makes an angle of 30 degrees with the z axis. What is the magnetic flux through a 3-square meter portion of the xy plane?
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A molecule with mass m = 255mp (where mp is the mass of a proton) and charge q = −e, moving with a velocity v = 2 × 105 m/s, enters a region of uniform magnetic field B = 0.8 T, as shown in the figure above. The particle strikes the wall at a distance d from the entrance slit.
Determine d.
In the figure below, a metal bar sitting on two parallel conducting rails, connected to each other by a resistor, is pulled to the right with a constant force of magnitude Fapp = 1.20 N.The friction between the bar and rails is negligible. The resistance R = 8.00 Ω,the bar is moving at a constant speed of 1.75 m/s, the distance between the rails is ℓ, and a uniform magnetic field
B is directed into the page. Two parallel horizontal rails are vertically aligned and connected on their left ends by a wire. A resistor R is in the middle of the wire. The rails are separated by a distance ℓ. A bar lies vertically across the middle of the rails, to the right of the wire. An arrow labeled Fapp extends from the middle of the bar to the right.
(a) What is the current through the resistor (in A)?
(b) If the magnitude of the magnetic field is 2.60 T, what is the length ℓ (in m)?
(c) What is the rate at which energy is delivered to the resistor (in W)?
(d) What is the mechanical power…
Chapter 32 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 32 - 15. Figure 32-9(a) depicts a two-turn horizontal...Ch. 32 - 32.16 [I] Figure 32-9(b) depicts a two-turn...Ch. 32 - 32.17 [I] Figure 32-9(a) depicts a two-turn...Ch. 32 - 32.18 [I] Figure 32-9(b) depicts a two-turn...Ch. 32 - Prob. 19SPCh. 32 - Prob. 20SPCh. 32 - Prob. 21SPCh. 32 - Prob. 22SPCh. 32 - Prob. 23SPCh. 32 - 32.24 [II] A room has its walls aligned accurately...
Ch. 32 - 26. A flat coil with a radius of 8.0 mm has 50...Ch. 32 - 27. The square coil shown in Fig. 32-11 is 20 cm...Ch. 32 - Prob. 28SPCh. 32 - Prob. 29SPCh. 32 - Prob. 32SPCh. 32 - 32.33 [II] A train is moving directly south at a...Ch. 32 - 32.34 [III] A copper disk of 10-cm radius is...Ch. 32 - 32.35 [II] How much charge will flow through a...Ch. 32 - Prob. 36SP
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- Two frictionless conducting rails separated by l = 55.0 cm are connected through a 2.00- resistor, and the circuit is completed by a bar that is free to slide on the rails (Fig. P32.71). A uniform magnetic field of 5.00 T directed out of the page permeates the region, a. What is the magnitude of the force Fp that must be applied so that the bar moves with a constant speed of 1.25 m/s to the right? b. What is the rate at which energy is dissipated through the 2.00- resistor in the circuit?arrow_forwardWithin the green dashed circle show in Figure P30.21, the magnetic field changes with time according to the expression B = 2.00t3 4.00t2 + 0.800, where B is in teslas, t is in seconds, and R = 2.50 cm. When t = 2.00 s, calculate (a) the magnitude and (b) the direction of the force exerted on an electron located at point P, which is at a distance r = 5.00 cm from the center of the circular field region. (c) At what instant is this force equal to zero? Figure P30.21arrow_forwardAs shown, the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed υ = 3.00 m/s. A resistor R = 0.400 Ω is connected to the rails at points a and b, directly opposite each other. The wheels make good electrical contact with the rails, so the axle, rails, and R form a closed-loop circuit. The only significant resistance in the circuit is R. A uniform magnetic field B = 0.080 0 T is vertically downward. (a) Find the induced current I in the resistor. (b) What horizontal force F is required to keep the axle rolling at constant speed? (c) Which end of the resistor, a or b, is at the higher electric potential? (d) What If? After the axle rolls past the resistor, does the current in R reverse direction? Explain your answer.arrow_forward
- A 50 cm long metal rod moves along the two rails so that plane of the circuit and is perpendicular to the magnetic field (x) B = 0.15 T. If R = 3.0 ohm and the uniform speed v = 2.0 m/s, what is the induced current I? Group of answer choices 0.05 A 15 mA 5.0 mA 20 Aarrow_forwardA metal wire of mass m = 24.1 mg can slide with negligible friction on two horizontal parallel rails separated by distance d = 2.56 cm. The track lies in a vertical uniform magnetic field of magnitude 56.3 mT. At time t = 0, device G is connected to the rails, producing a constant current i = 9.13 mA in the wire and rails (even as the wire moves). At t = 61.1 ms, what are the wire’s (a) speed and (b) direction of motion (left or right)?arrow_forwardA copper square loop with sides 0.08 m and mass 0.23 kg can spin freely around the central axis in the square’s plane. A current of 9.5 A is sent around the loop and a uniform magnetic field of 0.7 T is directed parallel to the plane of the square. What is the maximum kinetic energy that the loop can acquire?arrow_forward
- The magnetic dipole moment of a current-carrying loop of wire is in the positive z direction. If a uniform magnetic field is in the positive x direction the magnetic torque on the loop is: (0 , in the positive y direction, in the negative y direction, in the positive z direction, in the negative z direction.)arrow_forwardIn the figure, an electron with an initial kinetic energy of 4.10 keV enters region 1 at time t = 0. That region contains a uniform magnetic field directed into the page, with magnitude 0.00550 T. The electron goes through a half-circle and then exits region 1, headed toward region 2 across a gap of 23.0 cm. There is an electric potential difference ΔV = 2000 V across the gap, with a polarity such that the electron's speed increases uniformly as it traverses the gap. Region 2 contains a uniform magnetic field directed out of the page, with magnitude 0.0247 T. The electron goes through a half-circle and then leaves region 2. At what time t does it leave?arrow_forwardA rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. The rod carries a current of I = 68.0 A in the direction shown and rolls along the rails without slipping. A uniform magnetic field of magnitude 0.530 T is directed perpendicular to the rod and the rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Assume that the rod is of uniform density.)arrow_forward
- In the figure, a metal wire of mass m = 26.7 mg can slide with negligible friction on two horizontal parallel rails separated by distance d = 2.60 cm. The track lies in a vertical uniform magnetic field of magnitude 66.8 mT. At time t = 0 s, device G is connected to the rails, producing a constant current i = 9.48 mA in the wire and rails (even as the wire moves). At t = 46.3 ms, what are the wire's (a) speed and (b) direction of motion?arrow_forwardA rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. The rod carries a current of I = 32.0 A in the direction shown and rolls along the rails without slipping. A uniform magnetic field of magnitude 0.560 T is directed perpendicular to the rod and the rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Assume that the rod is of uniform density.) Note: Image for the figure.arrow_forwardA rod of m = 1.3 kg rests on two parallel rails that are L = 0.35 m apart. The rod carries a current going between the rails (bottom to top in the included image) with a magnitude I = 3.4 A. A uniform magnetic field of magnitude B = 0.55 T pointing upward is applied to the region, as shown in the figure. The rod moves a distance d = 0.35 m along the rails in a given time period. Ignore the friction on the rails. Express the final speed of the rod, v, in terms of F, d, and m, if it started from rest. Calculate the numerical value of v, in meters per second.arrow_forward
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