Why RMS value is used instead of average value?

If we take the direct mean or average value of ac current is zero. Hence the rms value are used. It give the effective value of ac. The rms value helps us to compare the both current dc as well as ac.

What is the difference between average velocity and RMS velocity?

Root mean square velocity (RMS value)is the square root of the mean of squares of the velocity of individual gas molecules. Average velocity is the arithmetic mean of the velocities of different molecules of a gas at a given temperature.

Why is root mean square better than mean?

RMS gives you the equivalent DC voltage for the same power. If you would measure the resistor’s temperature as a measure of dissipated energy you’ll see that it’s the same as for a DC voltage of 0.71 V, not 0.64 V. Measuring average voltage is cheaper than measuring RMS voltage however, and that’s what cheaper DMMs do.

Is the root mean square speed greater than the average speed?

For any list of numbers holds: The root mean square (rms) is always equal or higher than the average (avg). The reason is that higher values in the list have a higher weight (because you average the squares) in the calculation of a rms compared to the calculation of the avg.

What is most probable velocity and average velocity?

Most probable velocity is the velocity possessed by the largest number of molecules in a gas. Maxwell showed that the most probable velocity is given by the expression. The average velocity of an object is its total disarticulation divided by the entire time taken.

Why is the mean velocity always greater than the most probable velocity?

Why, in regards to the speed of particles, is the mean velocity always more than the most probable velocity? – Quora. Because the distribution (Maxwell-Boltzmann) has no upper bound on speed. The lower bound is zero, because negative speed has no meaning.

Is Average Power same as RMS power?

It the case of voltage then the RMS result is proportional to the heating power it will provide. For Power, RMS power makes no sense. RMS power is the same as average power.

Why is mean velocity always greater than the most probable velocity?

What is the relation between average velocity and most probable velocity?

RMS velocity = Average velocity > Most probable velocity.