KVPY2012PhysicsMagnetic Effects of Current
A loop carrying current I has the shape of a regular polygon of n sides. If R is the distance from the centre to any vertex, then the magnitude of the magnetic induction vector B at the centre of the loop is -
Options
- An ₀ I 2 R n
- B₀ I 2 R
- Cn ₀ I 2 R 2 n
- D₀ I R n
Correct answer
A. n ₀ I 2 R n
Step-by-step solution
aligned B _ net &= n B ₁ &= n ₀ 4 I R n 2 n aligned