A proton, a deuteron$(q=+e\mathit{,}\mathit{ }m=2.0 \mathrm{u}),$ and an alpha particle $(q=+2 e\mathit{,}\mathit{ }m=4.0 \mathrm{u})$ all having the same kinetic energy enter a region of uniform magnetic field $\overrightarrow{B},$moving perpendicular to $\overrightarrow{B}$. The ratio of

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 $P$?

An arbitrary shaped closed coil is made of a wire of length $L$ and a current $I$ ampere is flowing in it. If the plane of the coil is perpendicular to magnetic field $\overrightarrow{\mathit{B}}$, the force on the coil is