The circular loop PQRSTP formed by two circular segments of radii `R_1` and `R_2`, carries a
Channel: Doubtnut
Date: 2020-08-02

The circular loop PQRSTP formed by two circular segments of radii `R_1` and `R_2`, carries a current `I`. What is the magnetic field induction at the centre O? What will be the magnetic field induction at O if `alpha=90^@`?