#1
Which of the following is a renewable source of energy?
Solar
ExplanationRenewable source that harnesses energy from the sun.
#2
What is the primary function of a wind turbine?
To convert wind energy into electrical energy
ExplanationConverts wind's kinetic energy into electricity.
#3
What is the unit of power?
Watt (W)
ExplanationMeasure of rate of energy transfer or consumption.
#4
In which energy conversion process does nuclear fusion occur?
Solar Energy
ExplanationOccurs in the sun, producing vast energy.
#5
Which type of energy resource is coal?
Non-renewable
ExplanationDerived from fossilized plants, not replenished in a human lifetime.
#6
Which law of thermodynamics states that energy cannot be created or destroyed, only transformed or transferred?
First Law
ExplanationLaw stating conservation of energy.
#7
What is the efficiency of a machine that converts 400 J of input energy into 320 J of output energy?
80%
ExplanationEfficiency is 80%, calculated as (Output/Input) * 100.
#8
What is the SI unit of energy?
Joule (J)
ExplanationStandard unit for measuring energy.
#9
Which law of thermodynamics states that heat flows from hot to cold objects and never spontaneously in the reverse direction?
Second Law
ExplanationDescribes direction of heat transfer.
#10
Which law of thermodynamics states that the entropy of a closed system will never decrease over time?
Second Law
ExplanationEntropy tends to increase over time in a closed system.
#11
Which energy conversion process occurs in photovoltaic solar panels?
Light to Electrical
ExplanationConverts sunlight directly into electricity.
#12
What is the primary energy conversion process in a hydroelectric dam?
Potential to Kinetic
ExplanationConverts stored potential energy into kinetic energy.
#13
In which energy conversion process is chemical energy converted into electrical energy?
Battery Power
ExplanationBatteries store and release energy through chemical reactions.
#14
In which energy conversion process does tidal energy occur?
Mechanical to Electrical
ExplanationConverts kinetic energy of tides into electricity.
#15
In which energy conversion process is kinetic energy converted into electrical energy?
Wind Power
ExplanationConverts wind's kinetic energy into electricity.