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A straight long wire is turned into a loop of radius , as shown in figure 6 below. If a current is…

Physics20221 markMCQ
A straight long wire is turned into a loop of radius $R = 10\text{ cm}$, as shown in figure 6 below. If a current $I = 16\text{ A}$ is passed through the wire, then the magnetic field at the centre of the loop is:
  • (a)$3.4 \times 10^{-5}\text{ T}$
  • (b)$6.8 \times 10^{-5}\text{ T}$
  • (c)$1.7 \times 10^{-5}\text{ T}$
  • (d)$5.1 \times 10^{-5}\text{ T}$
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Moving charges and magnetism

From ISC 2022 Specimen Physics Paper 1, question 15.