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Theoretical considerations of the magnetohydrodynamic generator
The distinction between the magnetohydrodynamic generator and the conventional wire-wound generator is that the role of the armature in
the letter is played by an electrically conducting fluid in the former.
This fluid is passed through a transverse electric and magnetic field
and between two parallel plate electrodes. The induced electric field
in the fluid, which is proportional to the fluid velocity and magnetic
flux density, maintains a voltage drop across the electrodes and a
current is generated when the electrodes are connected to an external
load, closing the circuit. Thus energy is extracted from the fluid and
delivered to an external load as electrical power.