The current loop abcde formed by two circular segments of radii `r_1(=4cm)` and `r_2(=6cm)`
Channel: Doubtnut
Date: 2020-08-02

The current loop abcde formed by two circular segments of radii `r_1(=4cm)` and `r_2(=6cm)` with common centre at O, carries a current `I(=2A)` as shown in figure. What is the magnetic field at the common centre O? What will be the value of magnetic field at O when `theta=90^@`?