JEE Main 2024 Physics question
Two circular coils P and Q of 100 turns each have same radius of π cm. The currents in P and R are 1 A and 2 A respectively. P and Q are placed with their planes mutually perpendicular with their centers coincide. The resultant magnetic field induction at the center of the coils is √x mT, where x = . [Use μ₀ = 4π × 10⁻⁷ TmA⁻¹]
Answer: 20
Solution
B₁ = Nμ₀i₁/(2r) = (100 × 4π × 10⁻⁷ × 1)/(2π × 10⁻²) = 2 × 10⁻³ T = 2 mT and B₂
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