A) \[3.14\times {{10}^{-4}}T\]
B) \[6.28\times {{10}^{-5}}T\]
C) \[3.14\times {{10}^{-5}}T\]
D)
\[6.28\times {{10}^{-4}}T\] Correct Answer:
D Solution :
\[n=\frac{N}{L}=\frac{100}{50\times {{10}^{-2}}}=200\,\text{turns/m}\] \[\text{l = 2}\text{.5 A}\] On putting the values \[\text{B = 4}\pi \times \text{1}{{\text{0}}^{-7}}\times 200\times 2.5\] \[=6.28\times {{10}^{-7}}T\]
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