CUET · PHYSICS · PYQ PAPER 2025
Two concentric coils of radius \( 2\pi \) cm each are placed with their planes at right angles to each other and carry currents of 3 A and 4 A, respectively. The net magnetic field in \( \text{Wb/m}^2 \) at the center of the coils will be
- A \( 10^{-5} \)
- B zero
- C \( 7 \times 10^{-5} \)
- D \( 5 \times 10^{-5} \)
Answer & Solution
Correct Answer
(D) \( 5 \times 10^{-5} \)
Step-by-step Solution
Detailed explanation
\( B_1 = \frac{\mu_0 I_1}{2r} = \frac{4\pi \times 10^{-7} \times 3}{2 \times 2\pi \times 10^{-2}} = 3 \times 10^{-5} \text{ T} \) \( B_2 = \frac{\mu_0 I_2}{2r} = \frac{4\pi \times 10^{-7} \times 4}{2 \times 2\pi \times 10^{-2}} = 4 \times 10^{-5} \text{ T} \)…
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