Question
(a) Using the values given for an MHD drive in Exercise 22.36, and assuming the force is uniformly applied to the fluid, calculate the pressure created in $\textrm{N/m}^2$ (b) Is this a significant fraction of an atmosphere?\

#### Exercise 22.36

What force is exerted on the water in an MHD drive utilizing a 25.0-cm-diameter tube, if 100-A current is passed across the tube that is perpendicular to a 2.00-T magnetic field? (The relatively small size of this force indicates the need for very large currents and magnetic fields to make practical MHD drives.)
1. $1020 \textrm{ Pa}$
2. No, this is not a significant fraction of atmospheric pressure.
Solution Video