Questions
Two long wires PQR and MNP carry equal current I as shown such that QR and NP are parallel. Find the magnetic field at origin O.
detailed solution
Correct option is C
Due to PQ and MN, magnetic field at O will be zero.r=a sin 600 = 32 aBQR=μ04π Ir sin 900 − sin 300 ⊗= μ04π I3 a/2 × 12 ⊗ = μ0I4π3 a ⊗BNP = μ04π Ir sin 900 + sin 300 ⊙ = 3μ0I4π3a⊙Net field at O,B=BNP−BQR = μ0I23πa ⊙Talk to our academic expert!
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Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is
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