Question $4$

$\frac{0\mathrm{.}3}{0\mathrm{.}3}$ pts

An alpha particle has a charge of $)=(1\mathrm{.}6{10}^{-19}C$ and is moving at right angles to a magnetic field $B=0\mathrm{.}27T$ with a speed $v=8\mathrm{.}15{10}^5\frac{m}{s}.$ The force acting on this charged particle is

zero

$7\mathrm{.}0{10}^{-14}N$

$3\mathrm{.}3{10}^{5}N$

$5\mathrm{.}3{10}^{-14}N$

$4\mathrm{.}8{10}^{5}N$