Question

What is the magnetic field at the centre of semicircle

Answer 1

Answer:

magnetic field at the strength is 4ru0i

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Answer 2

Answer:

Answer

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Correct option is

D

4πrμ0i(π+2)

∣B∣ at centre =∣B∣ due to semicircle wire+ 2× ∣B∣ due semi infinite wire

=4rμ0i+4πr2μ0i

=4rμ0i×(1+π2)