Physics - Magnetism Question with Solution | TestHub

Ans (A)

(P) $\vec{B}$ due to wire = 0 ; $\vec{B}$ due to half loop $=\frac{{\mu }_{0}i}{4R}\otimes$

(Q) $\vec{B}$ due to wire = 0 ; $\vec{B}$ due to three-fourth loop $=\frac{{\mu }_{0}i}{4R}\times \frac{3\pi }{2\pi }\odot$

(R) $\vec{B}$ due to wire $=\frac{{\mu }_{0}i}{4\pi R}\times 2\otimes$ ; $\vec{B}$ due to three-fourth loop $=\frac{{\mu }_{0}i}{2R}\times \frac{3\pi }{2(2\pi )}\odot$

(S) $\vec{B}$ due to wire $=\frac{{\mu }_{0}i}{4\pi R}\times 2\odot$ ; $\vec{B}$ due to three-fourth loop $=\frac{{\mu }_{0}i}{2R}\times \frac{3\pi }{2(2\pi )}\odot$