AP EAMCET · PHYSICS · Magnetic Effects of Current
A straight wire carrying current \(i\) is turned into a circular loop. If the magnitude of magnetic moment associated with it in MKS units is \(M\), the length of wire will be
- A \(4 \pi i M\)
- B \(\sqrt{\frac{4 \pi M}{i}}\)
- C \(\sqrt{\frac{4 \pi i}{M}}\)
- D \(\frac{M \pi}{4 i}\)
Answer & Solution
Correct Answer
(B) \(\sqrt{\frac{4 \pi M}{i}}\)
Step-by-step Solution
Detailed explanation
Suppose, \(l\) be the length of wire. Hence, \(\quad l=2 \pi r \Rightarrow r=\frac{l}{2 \pi}\) \(\therefore\) Magnetic dipole moment,…
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