Three long straight parallel wires, carrying currents are arranged as shown in figure. The force exp

Question

Three long straight parallel wires, carrying currents are arranged as shown in figure. The force experienced by a 25 cm length wire C is\

Professor PC Thomas Classes · Answer

Magnetic field due to wire d at C is\ $B_{D}=\frac{\mu_{0}}{4 \pi} \frac{2 I}{r}=\frac{10^{-7} 	imes 2 	imes 30}{0.03}=2 	imes 10^{-4} \mathrm{~T}$\ which is directed into the page magnetic field due to wire $G$ is\ $B_{G}=\frac{10^{-7} 	imes 2 	imes 20}{0.02}=2 	imes 10^{-4} \mathrm{~T}$\ Which is directed out of the page\ $\mathrm{B}=\mathrm{B}_{\mathrm{D}}-\mathrm{B}_{\mathrm{G}}=0$\