AP EAMCET202419 May 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual
A tightly wound coil of 200 turns and of radius 20 cm carrying current 5 A . Magnetic field at the centre of the coil is
Options
- A3.14 10⁻³ ~T
- B3.14 10⁻² ~T
- C6.28 10⁻⁴ ~T
- D6.28 10⁻³ ~T
Correct answer
A. 3.14 10⁻³ ~T
Step-by-step solution
For tightly wound coil, N =200, r =20 ~cm , I =5 ~A Magnetic field at the centre of coil, aligned & B = ₀ IN 2 r = 4 10⁻⁷ 5 200 2 20 10⁻² & =3.14 10⁻³ ~T aligned