Physics · PYQ NEET UG 2020

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is (\( \mu_0 = 4\pi \times 10^{-7}\text{ T m A}^{-1} \))

1. A
   \( 3.14 \times 10^{-4}\text{ T} \)
2. B
   \( 6.28 \times 10^{-5}\text{ T} \)
3. C
   \( 3.14 \times 10^{-5}\text{ T} \)
4. D
   \( 6.28 \times 10^{-4}\text{ T} \)