The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K the root mean square velocity of the gas molecules is v, at 480 K it becomes
(A) 4 v
(B) 2 v
(C) v/2
(D) v/
Correct option (B) 2 v
Explanation
When temperature is increased from 120 K to 480 K (i.e., four times), the root mean square speed will become