Question

A nonmechanical water meter could utilize the Hall effect by applying a magnetic field across a metal pipe and measuring the Hall voltage produced.What is the average fluid velocity in m/s for a 4.25 cm diameter pipe, if a 0.575 T field across it creates a 60.0 mV Hall voltage?

Answer 1

Answer:

The velocity is  $v =2.455 \ m/s$

Explanation:

From the question we are told that  

   The diameter of the pipe is  $d = 4.25 \ cm = 0.0425 \ m$

    The magnetic field is  $B = 0.575 \ T$

     The hall voltage is  $V_H = 60.0 mV = 60 *10^{-3} \ V$

Generally the average fluid velocity is mathematically represented as

          $v = \frac{V}{ B * d }$

=>       $v = \frac{60*10^{-3}}{ 0.575 * 0.0425 }$

=>       $v =2.455 \ m/s$