TS EAMCET · Physics · Magnetic Effects of Current
Two concentric coils of 10 turns each are placed in the same plane. Their radii are \(20 \mathrm{~cm}\) and \(40 \mathrm{~cm}\) and carry 0.2 and \(0.3 \mathrm{~A}\). current respectively in opposite directions. The magnetic induction (in T) at the centre is
- A \(\frac{3}{4} \mu_0\)
- B \(\frac{5}{4} \mu_0\)
- C \(\frac{7}{4} \mu_0\)
- D \(\frac{9}{4} \mu_0\)
Answer & Solution
Correct Answer
(B) \(\frac{5}{4} \mu_0\)
Step-by-step Solution
Detailed explanation
Two coils carry currents in opposite directions, hence net magnetic field at centre will be difference of the two fields. ie,…
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