Explanation: Extraneous Variable. When we conduct experiments there are other variables that can affect our results, if we do not control them. These other variables are called extraneous or confounding variables.
The output of a wind turbine depends on the turbine's size and the wind's speed through the rotor. An average onshore wind turbine with a capacity of 2.5–3 MW can produce more than 6 million kWh in a year
