NEET · Physics · STD 12 - 4. Moving charges and magnetism
A closely packed coil having \(1000\) turns has an average radius of \(62.8\,cm\). If current carried by the wire of the coil is \(1\,A\), the value of magnetic field produced at the centre of the coil will be (permeability of free space \(=4 \pi \times 10^{-7}\,H / m\) ) nearly
- A \(10^{-1}\,T\)
- B \(10^{-2}\,T\)
- C \(10^{2}\,T\)
- D \(10^{-3}\,T\)
Answer & Solution
Correct Answer
(D) \(10^{-3}\,T\)
Step-by-step Solution
Detailed explanation
\(B =\frac{\mu_0 Ni }{2 R }\) \(=\frac{4 \pi \times 10^{-7} \times 1000 \times 1}{2 \times 62.8 \times 10^{-2}}\)
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