Flowing current

Electricity and Magnetism Level 2

What current must flow in a long, straight wire in order to produce a magnetic field of 10^-5 tesla at a distance of 2 centimeters from the wire?


The answer is 1.

Robert Fritz by Robert Fritz , 20, USA

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3 solutions

use magnetic field due to infinite wire

2 Helpful 0 Interesting 0 Brilliant 0 Confused

explain

Bushra Ali - 7 years, 2 months ago

explin

Sid Lodha - 7 years, 2 months ago

Hallo all,

as given flux density,B = 10^-5 Tesla, length = 2 cm =0.02 m, as it is in a straight line wire(infinite)....

by applying B = UoI / (2 x pie x length),

I = B(2 x pie x length) / Uo

I = 10^-5(2 x pie x 0.02) / (4 x pie x 10^-7)

I = 1A,therefore, current flowing through the wire is 1A...

thanks...

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Diyanko Bhowmik
Mar 29, 2014

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html#c2

Using the formula, enter the data and get the answer.

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