Question

Identify the correct labels of A, B and C in the following graph from the options given below :

Root mean square speed $(V_{rms})$; most probable speed $(V_{mp} )$; Average speed $(V_{av})$

• A. $A-V_{mp}; B-V_{av}; C-V_{rms}$
• B. $A-V_{mp}; B-V_{rms}; C-V_{av}$
• C. $A-V_{av}; B-V_{rms}; C-V_{mp}$
• D. $A-V_{rms}; B-V_{mp}; C-V_{av}$

Answer 1

Answer: (A)

Ratio of the speeds are :
$V _{ rms }: V _{ av }: V _{ mp }=1.22: 1.12: 1$
$V _{ rms }$ is greater in magnitude than $V _{ av }$ and $V _{ mp }$ is smallest in magnitude.