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A wire carries a current of23.0A from west to east.

Use the worked example above to help you solve this problem. A wire carries a current of23.0A from west to east. Assume that at this location the magnetic field of Earth is horizontal and directed from south to north and that it has a magnitude of5.0010-5T.(a)Find the magnitude and direction of the magnetic force on a37.9m length of wire.


 -- Direction -- north west downward east upward south

(b)Calculate the gravitational force on the same length of wire if it's made of copper and has a cross-sectional area of2.9410-6m2.


What current would make the magnetic force in the example equal in magnitude to the gravitational force?I =  A

A large current would very rapidly melt the wire.

Top Answer

here, length of wwire , l = 37.9 m current , i = 23.0 A magnetic feild , B = 5 * 10^-5 T a) force , F = I * L XB F = 23.0 *... View the full answer

1 comment
  • hope it helps :)
    • J.Campbell
    • Jul 20, 2016 at 10:51am

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Other Answers

The answers are:    a).  0.043585 N, upwards    b).  9.77317446 N    c).  5157.35 A                    ... View the full answer

1 comment
  • Thank you for your patience. Any questions or clarification is welcomed.
    • cplusplusexpert
    • Jul 21, 2016 at 9:46am

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