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4. Moving charges and magnetism — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics4. Moving charges and magnetism1 Mark
MCQ
Two infinitely long parallel wires carry equal current in same direction. The magnetic field at a mid point in between the two wires is
  • A
    Twice the magnetic field produced due to each of the wires
  • B
    Half of the magnetic field produced due to each of the wires
  • C
    Square of the magnetic field produced due to each of the wires
  • ✓
    Zero
✓

Answer

Correct option: D.
Zero
d
(d) At midpoint, magnetic fields due to both the wires are equal and opposite. So $B_{Net}= 0.$

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