(a) A circular coil of wire has radius 20 cm and contains 23 loops. The current in each loopis 4 A, and the coil is placed in a 2.5 T external magnetic field making an angle 45°.Determine the torque exerted on the coil by the magnetic field.(b) A Horizontal wire carries a current I₁ = 75 A dc. A second parallel wire 25 cm belowit must carry how much current so that it doesn't fall due to gravity. The lower wirehas a mass of 0.14 g per meter of length.= 2.0 × 10-7Tm/A]

Answered: Image /qna-images/answer/aab192a7-5680-412e-9b5a-9209c4a99366.jpg

A circular coil of wire has radius 20 cm and con is 4 A, and the coil is placed in a 2.5 T externa Determine the torque exerted on the coil by the A Horizontal wire carries a current 1₁ = 75 A- it must carry how much current so that it doe has a mass of 0.14 g per meter of length.

A circular coil of wire has radius 20 cm and con is 4 A, and the coil is placed in a 2.5 T externa Determine the torque exerted on the coil by the A Horizontal wire carries a current 1₁ = 75 A- it must carry how much current so that it doe has a mass of 0.14 g per meter of length.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 85AP: Acircularcoiofwireofradius5.Ocmhas2Otums and carries a current of 2.0 A. The coil lies in a magnetic...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

(a) A circular coil of wire has radius 20 cm and contains 23 loops. The current in each loop
is 4 A, and the coil is placed in a 2.5 T external magnetic field making an angle 45°.
Determine the torque exerted on the coil by the magnetic field.
(b) A Horizontal wire carries a current I₁ = 75 A dc. A second parallel wire 25 cm below
it must carry how much current so that it doesn't fall due to gravity. The lower wire
has a mass of 0.14 g per meter of length.
= 2.0 × 10-7Tm/A]

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