Find the force and torque on the wire AB due to the infinitely long wire. Neglect gravity.
A
μ0i22π,loge(a+la),μ0i2l2π
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
zero,μ0i2l2π
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
μ0i22πln(la),μ0i2l2π
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
μ0i22πln(l+aq),zero
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is Aμ0i22π,loge(a+la),μ0i2l2π dF=BidxSin90∘dτ=df×x dF=μ0i2πxidx=μ0i22πx×xdx dF=μ0i22πdxxτ=μ0i22π∫a+1adx F=μ0i22π∫a+ladxx=μ0i22π(a+l−a) F=μ0i22πloge(a+l2)=μ0i22π×l