The magnetic field at the center O of the following current loop is
A. \(\frac{\mu_{0} I}{4 r} \otimes\)
B. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{4 \mathrm{r}} \odot\)
C. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{2 \mathrm{r}} \otimes\)
D. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{2 \mathrm{r}} \odot\)
Answer:A
The magnetic field at the center O of the following current loop is
A. \(\frac{\mu_{0} I}{4 r} \otimes\) B. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{4 \mathrm{r}} \odot\) C. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{2 \mathrm{r}} \otimes\) D. \(\frac{\mu_{\mathrm{o}} \mathrm{I}}{2 \mathrm{r}} \odot\)