Advertisements
Advertisements
प्रश्न
Give an example
Light energy changes to electrical energy.
एक शब्द/वाक्यांश उत्तर
Advertisements
उत्तर
Solar cell
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
When does a force perform work?
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
How many watts equal one horse power?
What is the ratio of SI units to CGS units of 'work'?
Name the type of energy possessed by a body due to a change in configuration.
Is it easier to turn a steering wheel of large diameter than that of small diameter? Why?
A lead bullet moving at 70 ms-1 is brought to rest on hitting a target. If 80% of its energy is converted into heat energy, find the rise in temperature (Sp. Heat cap. Of lead is 140 J/kgK).
