Two charged particles$M$ and $N$ enter a space of uniform magnetic field with velocities perpendicular to the magnetic field. The paths are as shown in the figure. The possible reason for different paths may be

The bent wire shown in figure lies in a uniform magnetic field. Each straight section is $2.0 \mathrm{m}$ long and makes an angle of $\stackrel{}{\theta }=60°$ with the $x$-axis, and the wire carries a current of $2.0 \mathrm{A}$. What is the net magnetic force on the wire in unit-vector notation if the magnetic field is given $4.0 \hat{k} \mathrm{T}$?

The bent wire shown in figure lies in a uniform magnetic field. Each straight section is $2.0 \mathrm{m}$ long and makes an angle of $\stackrel{}{\theta }=60°$ with the $x$-axis, and the wire carries a current of $2.0 \mathrm{A}$. What is the net magnetic force on the wire in unit-vector notation if the magnetic field is given $4.0\hat{i} \mathrm{T}?$

In a metal wire of mass $m=24.1 \mathrm{mg}$ can slide with negligible friction on two horizontal parallel rails separated by a distance $d=2.56 \mathrm{cm}$. The track lies in a vertical uniform magnetic field of magnitude $56.3 \mathrm{mT}$. At time $t=0$, device $\mathrm{G}$ is connected to the rails, producing a constant current $i=9.13 \mathrm{mA}$ in the wire and rails (even as the wire moves). At $t=61.1 \mathrm{ms}$, what is the wire’s speed?

In a metal wire of mass $m=24.1 \mathrm{mg}$ can slide with negligible friction on two horizontal parallel rails separated by a distance $d=2.56 \mathrm{cm}$. The track lies in a vertical uniform magnetic field of magnitude $56.3 \mathrm{mT}$. At time $t=0$, device $G$ is connected to the rails, producing a constant current $i=9.13 \mathrm{mA}$ in the wire and rails (even as the wire moves).At $t=61.1 \mathrm{ms}$, what is the wire’s direction of motion (left or right)?

Figure shows three long straight wires $P$, $Q$ and $R$ carrying currents normal to the plane of the paper. All three currents have the same magnitude. Which arrow best shows the direction of the resultant force on the wire $P$?