Question

In the diagram, A is a circular coil of wire carrying an anticlockwise current I₁. C is an infinite long straight wire carrying a current I₂ perpendicular into the plane of paper through the centre of the coil. Force on C due to A is (R = Radius of coil) –

• A. $\frac { \mu _ { 0 } I _ { 1 } I _ { 2 } } { 2 }$
• B. µ₀I₁I₂
• C.
• D. Zero

Answer 1

Answer: (D)

Zero

Answer 2

Force on a current carrying wire = IBl_eff sinq Magnetic field due to circular loop at centre will be in +z direction hence force of wire C is 0.