A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is setup in a chamber . A charged particle enters the chamber and travels deflected along a straight path with constant speed . What can you say about the initial velocity of the particle ?

Question

$\begin{array}{1 1} 90^{\circ} \\ 45^{\circ} \\ 60^{\circ} \\ 0^{\circ}\;or\; 180^{\circ} \end{array}$