Physics · JEE | Moving Charges and Magnetism

What is the magnetic field at the centre of a circular coil of radius \( 5\text{ cm} \) having \( 50\text{ turns} \) and carrying a current of \( 2\text{ A} \)?

1. A
   \( 1\pi \times 10^{-4}\text{ T} \)
2. B
   \( 2\pi \times 10^{-4}\text{ T} \)
3. C
   \( 8\pi \times 10^{-4}\text{ T} \)
4. D
   \( 4\pi \times 10^{-4}\text{ T} \)