Wind turbines convert the kinetic energy in wind into mechanical power, which can then be converted into electricity, thus making wind energy the primary source.
Contents
MCQs
1. What part of the wind turbine captures the wind’s kinetic energy?
A. The tower
B. The blades
C. The generator
D. The base
Answer: B. The blades
Explanation: The blades of a wind turbine are designed to capture the wind’s kinetic energy. They are shaped and angled to catch the wind, causing them to rotate.
2. What does the rotor in a wind turbine do?
A. Converts wind energy directly into electricity
B. Connects the blades to the generator
C. Converts mechanical energy into electrical energy
D. Transfers the rotational energy from the blades to the generator
Answer: D. Transfers the rotational energy from the blades to the generator
Explanation: The rotor, comprised of the blades and hub, captures wind energy and transfers the rotational motion to the generator through the shaft.
3. What is the role of the generator in a wind turbine?
A. To increase wind speed
B. To store electricity
C. To convert mechanical energy into electrical energy
D. To rotate the blades
Answer: C. To convert mechanical energy into electrical energy
Explanation: The generator’s role is to convert the mechanical energy, supplied by the rotation of the turbine’s blades, into electrical energy through electromagnetic induction.
4. How does wind speed affect a wind turbine’s electricity generation?
A. Electricity generation decreases with higher wind speeds.
B. Electricity generation is not affected by wind speeds.
C. Electricity generation increases with higher wind speeds.
D. Electricity generation only occurs at a specific wind speed.
Answer: C. Electricity generation increases with higher wind speeds.
Explanation: Generally, as wind speed increases, more kinetic energy is available to be converted into electricity, thus increasing the electricity generated by the turbine.
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