TS EAMCET · Physics · Magnetic Effects of Current
A current flows along a thin wire shaped as shown in figure. The radius of curved part of the wire is equal to , the angle . The magnitude of magnetic field at the point is approximately
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
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Detailed explanation
Magnetic field due to curved part=μ0I4πR2π-2ϕ-k^=10-7×50.1×2π-π2-k^≈23.6μT-k^ Magnetic field due to straight part=μ0I4πdsinϕ1+sinϕ2-k^=μ0I4πrcos45°sin45°+sin45°-k^=10-7×50.1×12×12+12-k^=10μT-k^Therefore, net magnetic fieldB→net=33.6μT-k^
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