____are devices which work on wind.
windmills
solar panel
nuclear power plant
none of these
Fill the blanks by LPG : Butane, CNG :
ethane
methane
propane
The product of petroleum used to drive heavy vehicles like trucks is :
petrol
kerosene
diesel
petroleum gas
Coal is a _________ source of energy.
non renewable
renewable
atomic
thermal
The efficiency of the solar cooker can be increased by using ___with it.
an absorber
a refractor
a reflector
an insulator
The energy produced inside the Sun is due to
electron transition
fission
Fusion
The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :
15 km/h
25 km/h
35 km/h
45 km/h
The main constituent present in LPG(cooking gas) is
butane
benzene
Find the odd one which doesn't come into the group
Coal
Petroleum
Biogas
Natural gas
