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There are two wires ab and cd in a vertical plane as shown in figure. Direction of current in wire ab is rightwards. Choose the correct options.

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If wire cd is fixed, then wire ab can be kept in equilibrium by flowing current in cd in rightward direction

If wire ab is fixed, then wire cd can be kept in equilibrium by the current in cd in leftward direction

Equilibrium of wire ab will be stable equilibrium

Equilibrium of wire cd will be stable equilibrium

answer is A, B, C.

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Detailed Solution

Magnetic force on a current carrying conductor $\vec{F_{m}} = i \vec{l} \times \vec{B} . A l s o m a g n e t i c f i e l d (\vec{B}) a t a p o i n t p r o d u c e d b y a s t r a i g h t w i r e$

is inversely proportional to the distance of that point from the axis of the wire.

Magnetic field produced by ab at the location of cd points outward .

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