AP EAMCET · PHYSICS · Magnetic Effects of Current
Two concentric thin circular rings of radii 50 cm and 40 cm , each carry a current of 3.5 A in opposite directions. If the two rings are coplanar, the net magnetic. field due to the two rings at their centre is
- A \(11 \times 10^{-7} \mathrm{~T}\)
- B \(22 \times 10^{-7} \mathrm{~T}\)
- C \(17 \times 10^{-7} \mathrm{~T}\)
- D \(8 \times 10^{-7} \mathrm{~T}\)
Answer & Solution
Correct Answer
(A) \(11 \times 10^{-7} \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{r}_1=40 \mathrm{~cm}, \mathrm{r}_2=50 \mathrm{~cm}, \mathrm{I}=3.5 \mathrm{~A}\) The magnitude of magnetic field at the centre O of ring,…
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