Problem 6: Two power lines, line 1 and line 2, both of length L 88 m, are strung east-west between two towers. line 1 is r12 1.1 m directly above line 2. The current in both power lines is IL- 77 A to the west. Assume the power lines are straight and you can use the approximation ri2 << L Randomized Variables LL 88 m 12 1.1 m IL-77 A A Part (a) Find the magnitude of the magnetic field B21, in teslas, produced by line 1 at Part (b) What is the direction of the magnetic field produced by line 1 at line 2? Part (c) Calculate the magnitude of the magnetic force F21, in newtons, that the line 2 South. Correct! current in line 1 exerts on line 2. Part (d) Assume a typical power line has a mass of 890 kg per 1000 m. How many times larger would the current in both lines have to be for the magnetic force on the line to balance the force of gravity? tan() acos() sinh0) sin cos(0) cotanO asin acos 4 5 6 atan()acotan(0 coshO cotanhO 0 Degrees O Radians BACKSPACE CLEAR Submit Hint I give up!

Problem 6: Two power lines, line 1 and line 2, both of length L 88 m, are strung east-west between two towers. line 1 is r12 1.1 m directly above line 2. The current in both power lines is IL- 77 A to the west. Assume the power lines are straight and you can use the approximation ri2 << L Randomized Variables LL 88 m 12 1.1 m IL-77 A A Part (a) Find the magnitude of the magnetic field B21, in teslas, produced by line 1 at Part (b) What is the direction of the magnetic field produced by line 1 at line 2? Part (c) Calculate the magnitude of the magnetic force F21, in newtons, that the line 2 South. Correct! current in line 1 exerts on line 2. Part (d) Assume a typical power line has a mass of 890 kg per 1000 m. How many times larger would the current in both lines have to be for the magnetic force on the line to balance the force of gravity? tan() acos() sinh0) sin cos(0) cotanO asin acos 4 5 6 atan()acotan(0 coshO cotanhO 0 Degrees O Radians BACKSPACE CLEAR Submit Hint I give up!

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter22: Magnetic Forces And Magnetic Fields

Section: Chapter Questions

Problem 13OQ: Two long, parallel wires carry currents of 20.0 A and 10.0 A in opposite directions (Fig. OQ22.13)....

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Two long coaxial copper tubes, each of length L, are connected to a battery of voltage V. The inner tube has inner radius o and outer radius b, and the outer tube has inner radius c and outer radius d. The tubes are then disconnected from the battery and rotated in the same direction at angular speed of radians per second about their common axis. Find the magnetic field (a) at a point inside the space enclosed by the inner tube r d. (Hint: Hunk of copper tubes as a capacitor and find the charge density based on the voltage applied, Q=VC, C=20LIn(c/b) .)
Solenoid A has length L and N turns, solenoid B has length 2L and N turns, and solenoid C has length L/2 and 2N turns. If each solenoid carries the same current, rank the magnitudes of the magnetic fields in the centers of the solenoids from largest to smallest.
Sketch a plot of the magnitude of the magnetic field as a function of position r for a coax (Fig. P31.27).
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Calculate the magnitude of the magnetic field at a point 25.0 cm from a long, thin conductor carrying a current of 2.00 A.
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Figure CQ19.7 shows a coaxial cable carrying current I in its inner conductor and a return current of the same magnitude in the opposite direction in the outer conductor. The magnetic field strength at r = r0 is Find the ratio B/B0, at (a) r = 2r0 and (b) r = 4r0. Figure CQ19.7
Consider a solenoid that is very long compared with its radius. Of the following choices, what is the most effective way to increase the magnetic field in the interior of the solenoid? (a) double its length, keeping the number of turns per unit length constant (b) reduce its radius by half, keeping the number of turns per unit length constant (c) overwrap the entire solenoid with an additional layer of current-carrying wire
Within 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 P30.21
A mass spectrometer (Fig. 30.40, page 956) operates with a uniform magnetic field of 20.0 mT and an electric field of 4.00 103 V/m in the velocity selector. What is the radius of the semicircular path of a doubly ionized alpha particle (ma = 6.64 1027 kg)?
Two long, parallel wires carry currents of 20.0 A and 10.0 A in opposite directions (Fig. OQ22.13). Which of the following statements is true? More than one statement may be correct. (a) In region I, the magnetic field is into the page and is never zero. (b) In region II, the field is into the page and can be zero. (c) In region III, it is possible for the field to be zero. (d) In region I, the magnetic field is out of the page and is never zero. (e) There are no points where the field is zero. Figure OQ22.13 Objective Questions 13 and 14.
, (a) At what angle 0 is tlie torque on a current loop 90.0% of maximum? (b) 50.0% of maximum? (c) 10.0% of maximum?