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JEE Main2005PhysicsMagnetic Effects of CurrentActual

Two concentric coils each of radius equal to 2 cm are placed at right angles to each other. 3 Ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in Weber / m ^2 at the centre of the coils will be ( ₀=4 10⁻⁷ . Wb/A-m)

Options

  1. A12 10⁻⁵
  2. B10⁻⁵
  3. C5 10⁻⁵
  4. D7 10⁻⁵

Correct answer

C. 5 10⁻⁵

Step-by-step solution

B= _o 2 r I₁^2+I₂^2 B= 4 10⁻⁷ 2 2 10⁻² 5B=5 10⁻⁵

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