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If the volatile content of magma is increased,its viscosity will
Universal Motor
A type of motor that can be operated on AC or DC power.
AC
Alternating Current refers to an electrical current that periodically changes its direction of charge flow.
DC
Direct Current, a type of electrical current where the flow of electric charge is only in one direction.
Shading Coil
A large copper wire or band connected around part of a magnetic pole piece to oppose a change of magnetic flux.
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