Questions
current r is flowing in a straight conductor of length l. The magnetic induction at a point distant l /4 from its centre will be(fig)
a
zero
b
μ0i/(2l)
c
μ0i/(2πl)
d
4μ0i/(5πl)
detailed solution
Correct option is D
See fig. We know that magnetic induction B at a distance r from a long straight conductor carrying a current i is given by B=μ0i4πr[sinα+sinβ]Here α=α, β=α and r=l/4∴ (sinα+sinβ)=2sinα=2l/25l/4=45∴ B=μ0i4π(l/4)×45=4μ0i5πlTalk to our academic expert!
Similar Questions
ABCD is a square loop made of a uniform conducting wire. The current enters the loop at A and leaves at D. The magnetic field is
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