AP EAMCET · PHYSICS · Magnetic Effects of Current
Two concentric coils of 20 turns each are placed in same plane. Their radii are \(30 \mathrm{~cm}\) and \(60 \mathrm{~cm}\) and carry \(0.4 \mathrm{~A}\) and \(0.6 \mathrm{~A}\) currents respectively in opposite directions. The magnetic induction at the centre in tesla is ....... .
- A \(\frac{8}{3} \mu_0\)
- B \(\frac{2}{3} \mu_0\)
- C \(\frac{5}{3} \mu_0\)
- D \(\frac{10}{3} \mu_0\)
Answer & Solution
Correct Answer
(D) \(\frac{10}{3} \mu_0\)
Step-by-step Solution
Detailed explanation
As \(\quad B_{\text {centre }}=\frac{\mu_0 n I}{2 r}\) So, Magnetic field at \(\mathrm{O}\),…
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