Final answer:
Electromagnetic induction is the effect used in a turbine to convert mechanical energy into electricity.
Step-by-step explanation:
The effect used in a turbine to convert mechanical energy into electricity is electromagnetic induction. This process involves the use of a magnetic field and a conductor to generate an electric current. In a turbine, the mechanical energy from the movement of the turbine blades is used to rotate a magnet inside a coil of wire, creating a changing magnetic field that induces an electric current in the wire.
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