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Moving Charges and Magnetism — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
Current of 1 A is flowing through two parallel wires in the same direction and distance between the wires is 1 m . The mutual attractive force at unit length will be :
  • ✓
    $2 \times 10^{-7} Nm ^{-1}$
  • B
    $4 \times 10^{-7} Nm ^{-1}$
  • C
    $8 \times 10^{-7} Nm ^{-1}$
  • D
    $10^{-7} Nm ^{-1}$
✓

Answer

Correct option: A.
$2 \times 10^{-7} Nm ^{-1}$
(a)$2 \times 10^{-7} Nm ^{-1}$

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