A charged particle subjected to cross fields (E = 200 N/C and B = 100 G) goes 3 undeflected. Calculate the speed of the charged particle.
a) 6 × 10⁵ m/s
b) 3 × 10⁵ m/s
c) 2 × 10⁵ m/s
d) 1 × 10⁵ m/s