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AP EAMCET202318 May 2023Evening ShiftPhysicsMagnetic Effects of CurrentActual

A straight wire carrying a current of 12 ~A is bent into a semi-circular arc of radius 2 ~cm as shown in the figure. Then the magnetic field due to the straight segments at the centre of the arc is

Options

  1. A12 ~T
  2. B6 ~T
  3. C24 ~T
  4. D0

Correct answer

D. 0

Step-by-step solution

(dFor a point O d l and r for each element of the straigh segment AB and DE are parallel. Therefor, d l r =0 Hence, magnetic field at O due to current through straight segments AB and DE is B = ₀ 4 id l r r ^3 =0

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