A long straight conductor carries 35 A.
Find the magnetic field produced due to
this conductor at a point 20 cm away from
the centre of the wire.
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The magnetic induction B at a distance ‘r’ from a straight wire carrying ‘I’ amperes of current is (mu) I/(2(pi)r weber per square meter. Now I=35 amperes and r=20 cm = 0.2 m, The value of ‘mu’ for free space is 4(pi)/10^7 h/m so B=2x35/(10^7x0.2)=350/10^7=35x10^(-6) webers per square meter
Explanation:
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