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AP EAMCET201823 Apr 2018Evening ShiftPhysicsMagnetic Effects of CurrentActual

A straight conductor of length 32 ~cm carries a current of 30 ~A . Magnetic induction at a point in air at a perpendicular distance of 12 ~cm from the mid-point of the conductor is

Options

  1. A0.2 G
  2. B0.3 G
  3. C0.4 G
  4. D0.5 G

Correct answer

C. 0.4 G

Step-by-step solution

= ₀ I 4 r ( ₁+ ₂ ) aligned & = 10⁻⁷ 30 12 10⁻² (2 16 20 ) & =4 10⁻⁵ ~T & =0.4 10⁻⁴ ~T & =0.4 G aligned

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