alleryWind energy can be harnessed if the wind speed at the location is at least about:
A3 km per hour
B300 km per hour
C75 km per hour
D15 km per hour
Answer & Solution
Correct answer: D. 15 km per hour
1. Wind turbines need a minimum air flow to overcome friction.
2. Below about 15 km per hour the blades produce too little torque.
3. Useful electricity production starts above this threshold.
4. So wind speed should be at least about 15 km/h.
5. Very high winds need brakes to prevent damage.
_Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_
Keep practising Environmental & Disaster Management
Browse all Environmental & Disaster Management questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
The flow chart "Sun → producer → consumer → decomposer" describes:In a food chain "Grass → Deer → Tiger", which trophic level has the LEAST energy availableThe Tyndall effect in air refers to scattering of light by:Composting kitchen waste at home contributes to:Which group of organisms recycles nutrients in an ecosystem?Increased UV radiation due to ozone depletion can cause:Which is the simplest correct food chain in a grassland ecosystem?Ozone (O₃) at ground level is: