Case : Read the passage and answer the question(s).

A charged particle whose mass is 19.9 ×10^-27 kg and charge is 1.6×10^-19 C moves with a speed of 3×10⁵ m/s at right angle to a magnetic field of 0.75 T.

What is the radius of the circle in which charged particle moves?

49.7×10^-3 m

r = \(\frac{mv}{qB}\) 

m = 19.9 x 10^-27 Kg ; v = 3 x 10⁵ m s^-2 ; q = 1.6 x 10^-19 C ; B = 0.75 T

r = 49.7×10^-3 m