7 7) Wire is wrapped around the equator of an Earth globe of radius 15cm, making tencomplete trips. The globe itself is a plastic sphere. To get a magnetic field of 23mT atthe north pole, how much current would be needed?

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Answered: 7) Wire is wrapped around the equator…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 6CQ: If a charged particle moves in a straight line through some region of space, can you say that the...

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Similar questions

If a charged particle moves in a straight line through some region of space, can you say that the magnetic field in that region is necessarily zero?
Is the Earth's magnetic field parallel to the ground at all locations? If not, where is it parallel to the surface? Is its strength the same at all locations? If not, where is it greatest?
What is the direction of the magnetic field that produces the magnetic force shown on the currents in each of the three cases in Figure 22.55, assuming B is perpendicular to I?
What is the direction of the magnetic force on the current in earth of the six cases in Figure 22.53?
Calculate the magnetic field strength needed on a 200-tum square loop 20.0 cm on a side to create a maximum torque of 300 N. m if the loop is carrying 25.0 A.
If a cosmic ray proton approaches the Earth from outer space along a line toward the center of the Earth that lies in the plane of the equator, in what direction will it be deflected by the Earth’s magnetic field? What about an electron? A neutron?
What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in each of the three cases in the figure below, assuming B is perpendicular to V?
What is the direction of the magnetic force on the current in each of the six cases?
What is the direction of a current that experiences the magnetic force shown in each of the three cases in Figure 22.54, assuming the current runs perpendicular to B?
Which of the following actions would double the magnitude of the magnetic force per unit length between two parallel current-carrying wires? Choose all correct answers. (a) Double one of the currents. (b) Double the distance between them. (c) Reduce the distance between them by half. (d) Double both currents.
A long solenoid that has 1 000 turns uniformly distributed over a length of 0.400 m produces a magnetic field of magnitude 1.00 104 T at its center. What current is required in the windings for that to occur?
How far from the starter cable of a car, carrying 150 A, must you be to experience a field less than the Earth's (5.00105T) ? Assume a long straight wire carries the current. (In practice, the body of your car shields the dashboard compass.)

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7) Wire is wrapped around the equator of an Earth globe of radius 15cm, making ten complete trips. The globe itself is a plastic sphere. To get a magnetic field of 23mT at the north pole, how much current would be needed?