A horizontal wire carries 200 amp current below which another wire of linear density 20- 10-3kgm-1 carrying a current is kept at 2 cm distance- If the wire kept below hangs in air- The current in this wire is -

The correct option is A 98 ASince wire hangs in the air, #160;So #160; mg=Bil ml=Big 20× 10^ 3= (μ _0ig2π r )i i=98A ...

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Standard XII

Physics

Surface Energy

A horizontal ...

Question

A horizontal wire carries 200 amp current below which another wire of linear density $20 \times 10^{- 3} k g m^{- 1}$ carrying a current is kept at 2 cm distance. If the wire kept below hangs in air. The current in this wire is :

100A

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9.8 A

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98 A

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48A

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Solution

The correct option is A 98 A
Since wire hangs in the air, So
$m g = B i l$
$\frac{m}{l} = \frac{B i}{g}$
$20 \times 10^{- 3} = (\frac{μ_{0} i}{g 2 π r}) i$
$i = 98 A$

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A horizontal wire carries 200 amp current below which another wire of linear density 20×10−3kgm−1 carrying a current is kept at 2 cm distance. If the wire kept below hangs in air. The current in this wire is :

The correct option is A 98 ASince wire hangs in the air, So mg=Bilml=Big20×10−3=(μ0ig2πr)ii=98A

A horizontal wire carries 200 amp current below which another wire of linear density $20 \times 10^{- 3} k g m^{- 1}$ carrying a current is kept at 2 cm distance. If the wire kept below hangs in air. The current in this wire is :

The correct option is A 98 A
Since wire hangs in the air, So
$m g = B i l$
$\frac{m}{l} = \frac{B i}{g}$
$20 \times 10^{- 3} = (\frac{μ_{0} i}{g 2 π r}) i$
$i = 98 A$