A proton moves along the $z$-axis with constant velocity. If a magnetic field is applied along $x$-axis, then the direction of magnetic force on proton will be,

A wire ’LN’ bent as shown in figure is placed in uniform perpendicular magnetic field of $5 \mathrm{T}$. A $10 \mathrm{A}$ current flows through the wire. Magnetic force experienced by the wire is,

A wire $ABCDEF$ has each side of length $l$ bent as shown in figure and carrying a current $i$. If it is placed in a uniform magnetic field $B$ which is parallel to $+y$ direction, the magnetic force experienced by the wire is,

A current $i$ is flowing through wire $PQR$. This wire is bent in the form of an angle and placed in uniform magnetic field $B$ according to figure. If $PQ=l$ and $\angle$$PQR=60°$, the ratio of magnetic forces on $PQ$ to $QR$, respectively, is,

A current of $10 \mathrm{A}$ flows through two long parallel wires. The magnetic force on each wire is $2\times {10}^{-3} \mathrm{N} {\mathrm{m}}^{-1}$. If the current is doubled and separation between them is halved, then magnetic force per unit length of each wire becomes,

Three long straight wires carrying currents are arranged according to figure. Magnetic force on $10 \mathrm{cm}$ part of the wire $Q$ is,