AP EAMCET202318 May 2023Morning ShiftPhysicsMagnetic Effects of CurrentActual
Consider a tightly wound 100 turn coil of radius 10 ~cm carrying a current of 2 ~A . The magnitude of the magnetic field at the centre of the coil is
Options
- A3.14 10⁻⁴ ~T
- B6.28 10⁻⁴ ~T
- C12.56 10⁻⁴ ~T
- D0
Correct answer
C. 12.56 10⁻⁴ ~T
Step-by-step solution
Number of turns n=100 Radius, r=10 ~cm =0.1 ~m current, I =2 ~A Magnetic field at center of coil: aligned & B = ₀ ni 2 r = 4 100 2 10 2 0.1 10⁻⁷ & ~B =12.56 10⁻⁴ ~T aligned