AP EAMCET · PHYSICS · Magnetic Effects of Current
The magnetic field due to current carrying a circular loop of radius \(5 \mathrm{~cm}\) at a point on the axis at a distance of \(12 \mathrm{~cm}\) from the centre is \(250 \mu \mathrm{T}\). The magnetic field at the centre of the loop is
- A \(2529 \mu \mathrm{T}\)
- B \(4394 \mu \mathrm{T}\)
- C \(1759 \mu \mathrm{T}\)
- D \(2908 \mu \mathrm{T}\)
Answer & Solution
Correct Answer
(B) \(4394 \mu \mathrm{T}\)
Step-by-step Solution
Detailed explanation
Given, \(R=5 \mathrm{~cm}=0.05 \mathrm{~m}\) \[ \begin{aligned} r & =12 \mathrm{~cm}=0.12 \mathrm{~m} \\ B & =250 \mu \mathrm{T} \\ & =250 \times 10^{-6} \mathrm{~T} \end{aligned} \] The magnetic field due to a current carrying circular loop at its axial line is…
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