🔹 1. Basic Concepts of Energy and its Procurement
- Energy = Ability to do work
- SI unit of energy = Joule (J)
- Power = Work done per unit time
- Unit of power = Watt (W)
👉 Trick:
- Energy → Joule
- Power → Watt
🔹 2. Types of Energy (MCQ Traps)
Mechanical Energy
- Kinetic energy → due to motion
- Potential energy → due to position
Other Forms
- Chemical energy → food, fuels
- Thermal energy → heat
- Electrical energy → current
- Nuclear energy → atomic reactions
👉 MCQ Trap:
- Moving object → kinetic
- Stretched spring / raised object → potential
🔹 3. Law of Conservation of Energy
- Energy cannot be created or destroyed
- Only converted from one form to another
👉 Frequently asked concept-based MCQ
🔹 4. Sources of Energy
✅ Renewable (Never-ending)
- Solar
- Wind
- Hydel (water)
- Biomass
- Geothermal
- Tidal
👉 Environment-friendly
❌ Non-renewable (Exhaustible)
- Coal
- Petroleum
- Natural gas
👉 Cause pollution
👉 MCQ shortcut:
- Fossil fuels = always non-renewable
🔹 5. Main Energy Sources (Important)
- Sun → ultimate source of energy
- Hydel energy → flowing water
- Wind energy → moving air
- Biogas → animal/plant waste
🔹 6. Energy Procurement (Production Methods)
🔸 Thermal Power Plants
- Fuel: Coal, oil, gas
- Process: Combustion → heat → steam → turbine → electricity
- Problem: Pollution
🔸 Hydroelectric Power
- Source: Dams (water)
- Clean & renewable
🔸 Nuclear Energy
- Process: Fission of uranium
- Advantage: High energy output
- Disadvantage: Radioactive waste
🔸 Solar Energy
- Solar panels → convert sunlight into electricity
- Based on photoelectric effect
🔹 7. Energy Conversion Devices
- Generator → Mechanical → Electrical
- Motor → Electrical → Mechanical
- Battery → Chemical → Electrical
👉 Very common MCQ area
🔹 8. Fuels & Important Facts
- Highest calorific value → Natural gas
- Clean fuel → Natural gas / Hydrogen
- LPG = Liquefied Petroleum Gas
- CNG = Compressed Natural Gas
🔹 9. Environmental Impact
- Coal & oil → Air pollution
- Nuclear → Radioactive waste
- Renewable → eco-friendly
👉 MCQ:
- Best solution to energy crisis → Energy conservation
🔹 10. Energy Crisis (Important)
- Meaning → Shortage of energy
- Causes:
- Overuse of fossil fuels
- Population growth
- Solution:
- Renewable energy
- Conservation
🔹 11. Pakistan-Based MCQs
- Major electricity source → Thermal power
- Hydel power from dams (Tarbela, Mangla – commonly asked)
🔹 12. Quick Revision (Last-Minute)
- Sun = main energy source
- Renewable = clean, unlimited
- Fossil fuels = polluting, limited
- Generator = produces electricity
- Battery = stores energy
- Nuclear = fission
- Energy crisis = shortage
✅ Energy & Its Procurement – 100 MCQs
🔹 Basic Concepts (1–15)
- Energy is the ability to:
A) Move objects
B) Do work ✅
C) Produce heat
D) Apply force - SI unit of energy is:
A) Watt
B) Joule ✅
C) Newton
D) Ampere - Unit of power is:
A) Joule
B) Watt ✅
C) Volt
D) Ohm - Power is defined as:
A) Energy stored
B) Work/time ✅
C) Force × distance
D) Speed - Energy due to motion is:
A) Potential
B) Kinetic ✅
C) Thermal
D) Chemical - Energy due to position is:
A) Kinetic
B) Potential ✅
C) Electrical
D) Sound - Stored energy in spring is:
A) Kinetic
B) Potential ✅
C) Heat
D) Electrical - Heat energy is also called:
A) Mechanical
B) Thermal ✅
C) Nuclear
D) Chemical - Energy in food is:
A) Mechanical
B) Chemical ✅
C) Electrical
D) Nuclear - Law of conservation states:
A) Energy created
B) Energy destroyed
C) Energy conserved ✅
D) Energy lost - Energy cannot be:
A) Stored
B) Transferred
C) Created or destroyed ✅
D) Measured - Moving water has:
A) Chemical
B) Kinetic ✅
C) Nuclear
D) Thermal - Stored water in dam has:
A) Kinetic
B) Potential ✅
C) Sound
D) Electrical - Unit Joule named after:
A) Newton
B) Joule ✅
C) Einstein
D) Faraday - Rate of energy transfer is:
A) Voltage
B) Current
C) Power ✅
D) Resistance
🔹 Sources of Energy (16–35)
- Main source of energy on Earth:
A) Moon
B) Sun ✅
C) Wind
D) Water - Renewable energy source:
A) Coal
B) Oil
C) Solar ✅
D) Gas - Non-renewable source:
A) Wind
B) Solar
C) Coal ✅
D) Water - Fossil fuels include:
A) Solar, wind
B) Coal, oil, gas ✅
C) Uranium
D) Biomass - Energy from Sun:
A) Nuclear
B) Solar ✅
C) Thermal
D) Wind - Wind energy is:
A) Chemical
B) Mechanical ✅
C) Nuclear
D) Electrical - Hydel energy comes from:
A) Wind
B) Water ✅
C) Sun
D) Coal - Biomass energy from:
A) Rocks
B) Plants/animals ✅
C) Air
D) Sun - Biogas source:
A) Coal
B) Waste ✅
C) Petrol
D) Uranium - Geothermal energy from:
A) Sun
B) Earth heat ✅
C) Wind
D) Water - Tidal energy caused by:
A) Wind
B) Moon gravity ✅
C) Sun heat
D) Rotation - Clean energy source:
A) Coal
B) Diesel
C) Solar ✅
D) Oil - Exhaustible source:
A) Solar
B) Wind
C) Petroleum ✅
D) Water - Non-conventional energy:
A) Coal
B) Oil
C) Solar ✅
D) Gas - Conventional energy:
A) Wind
B) Solar
C) Coal ✅
D) Tidal - Fossil fuels take:
A) Days
B) Years
C) Millions of years ✅
D) Months - Best renewable energy:
A) Coal
B) Solar ✅
C) Oil
D) Gas - Wind energy depends on:
A) Pressure
B) Weather ✅
C) Gravity
D) Heat - Hydropower uses:
A) Coal
B) Water ✅
C) Gas
D) Sun - Solar energy is:
A) Exhaustible
B) Renewable ✅
C) Nuclear
D) Chemical
🔹 Energy Conversion & Devices (36–55)
- Generator converts:
A) Electrical → Mechanical
B) Mechanical → Electrical ✅
C) Chemical → Electrical
D) Heat → Light - Motor converts:
A) Electrical → Mechanical ✅
B) Mechanical → Electrical
C) Heat → Electrical
D) Chemical → Heat - Battery converts:
A) Mechanical → Electrical
B) Chemical → Electrical ✅
C) Electrical → Heat
D) Light → Heat - Solar panel converts:
A) Heat
B) Light → Electrical ✅
C) Sound
D) Chemical - Electric bulb converts:
A) Electrical → Light ✅
B) Mechanical → Heat
C) Chemical → Electrical
D) Heat → Mechanical - Fan converts:
A) Electrical → Kinetic ✅
B) Kinetic → Electrical
C) Heat → Electrical
D) Sound → Electrical - Transformer is used to:
A) Store energy
B) Change voltage ✅
C) Produce heat
D) Generate current - Inverter converts:
A) AC → DC
B) DC → AC ✅
C) Heat → Electrical
D) Light → Electrical - Turbine converts:
A) Heat → Mechanical ✅
B) Electrical → Heat
C) Chemical → Electrical
D) Light → Heat - Fuel cell converts:
A) Chemical → Electrical ✅
B) Electrical → Chemical
C) Heat → Mechanical
D) Sound → Electrical - Solar cooker works on:
A) Reflection of heat/light ✅
B) Sound waves
C) Magnetic effect
D) Pressure - Electric current measured by:
A) Voltmeter
B) Ammeter ✅
C) Ohmmeter
D) Wattmeter - Voltage measured by:
A) Ammeter
B) Voltmeter ✅
C) Ohmmeter
D) Barometer - Resistance measured by:
A) Ammeter
B) Voltmeter
C) Ohmmeter ✅
D) Thermometer - Power measured by:
A) Joule
B) Wattmeter ✅
C) Volt
D) Ampere
🔹 Power Plants & Procurement (56–75)
- Thermal power uses:
A) Water
B) Coal ✅
C) Wind
D) Sun - Hydel power uses:
A) Steam
B) Water ✅
C) Gas
D) Oil - Nuclear energy from:
A) Combustion
B) Fission ✅
C) Evaporation
D) Condensation - Nuclear fuel:
A) Coal
B) Uranium ✅
C) Oil
D) Gas - Thermal plant causes:
A) Clean air
B) Pollution ✅
C) Cooling
D) Rain - Hydropower is:
A) Polluting
B) Clean ✅
C) Exhaustible
D) Nuclear - Nuclear plant produces:
A) Smoke
B) Radiation waste ✅
C) Water
D) Wind - Solar energy based on:
A) Combustion
B) Photoelectric effect ✅
C) Evaporation
D) Pressure - Power from dams:
A) Thermal
B) Hydel ✅
C) Nuclear
D) Solar - Pakistan major electricity source:
A) Solar
B) Thermal ✅
C) Wind
D) Nuclear - Energy production process:
A) Conversion of forms ✅
B) Creation
C) Destruction
D) Storage - Steam turbine uses:
A) Heat energy ✅
B) Sound
C) Light
D) Chemical - Wind turbines produce:
A) Heat
B) Electricity ✅
C) Nuclear
D) Chemical - Biogas plant produces:
A) Oxygen
B) Methane ✅
C) Nitrogen
D) Hydrogen - LPG contains:
A) Methane
B) Propane & butane ✅
C) Hydrogen
D) Nitrogen - CNG mainly contains:
A) Methane ✅
B) Propane
C) Butane
D) Hydrogen - Hydrogen is:
A) Dirty fuel
B) Clean fuel ✅
C) Solid fuel
D) Nuclear fuel - Coal formed from:
A) Rocks
B) Plants ✅
C) Metals
D) Water - Petroleum is:
A) Crude oil ✅
B) Solid fuel
C) Gas
D) Mineral - Combustion produces:
A) Light
B) Heat energy ✅
C) Sound
D) Motion
🔹 Environment & Energy Crisis (76–100)
- Energy crisis means:
A) Excess energy
B) Shortage of energy ✅
C) Storage
D) Transfer - Cause of energy crisis:
A) Less use
B) Overuse ✅
C) Rain
D) Wind - Best solution:
A) More coal
B) Conservation ✅
C) Deforestation
D) Waste - Global warming caused by:
A) Solar
B) Fossil fuels ✅
C) Wind
D) Water - Cleanest energy:
A) Coal
B) Solar ✅
C) Oil
D) Diesel - Pollution from:
A) Solar
B) Coal ✅
C) Wind
D) Water - Renewable reduces:
A) Oxygen
B) Pollution ✅
C) Water
D) Soil - Carbon footprint means:
A) Pollution level ✅
B) Energy use
C) Water use
D) Food - Sustainable energy means:
A) Unlimited clean energy ✅
B) Fossil fuels
C) Nuclear waste
D) Heat - Excess electricity use causes:
A) Stability
B) Load on system ✅
C) Cooling
D) Rain - Incomplete combustion produces:
A) CO₂
B) CO ✅
C) O₂
D) N₂ - Complete combustion produces:
A) CO
B) CO₂ ✅
C) O₂
D) N₂ - Calorific value means:
A) Heat produced ✅
B) Fuel cost
C) Shape
D) Smell - Highest calorific fuel:
A) Coal
B) Hydrogen ✅
C) Wood
D) Petrol - Renewable energy helps:
A) Pollution
B) Climate control ✅
C) Fuel loss
D) Waste - Fossil fuels are:
A) Clean
B) Polluting ✅
C) Renewable
D) Infinite - Nuclear energy advantage:
A) Low output
B) High output ✅
C) No risk
D) No waste - Solar energy disadvantage:
A) Pollution
B) Weather dependent ✅
C) Expensive fuel
D) Waste - Wind energy disadvantage:
A) Pollution
B) Weather dependent ✅
C) Costly fuel
D) Nuclear waste - Hydel energy disadvantage:
A) Pollution
B) Dam cost ✅
C) Fuel cost
D) Waste - Energy conservation means:
A) Saving energy ✅
B) Producing energy
C) Destroying energy
D) Storing energy - Efficient energy use leads to:
A) Waste
B) Saving resources ✅
C) Pollution
D) Loss - Main aim of energy policy:
A) Waste
B) Sustainability ✅
C) Pollution
D) Deforestation - Future energy sources:
A) Coal
B) Oil
C) Solar & Wind ✅
D) Gas - Best long-term energy solution:
A) Fossil fuels
B) Renewable energy ✅
C) Nuclear only
D) Coal
🎯 Tip for Exams
- Focus on:
- Units (Joule, Watt)
- Conversions (motor, generator, battery)
- Renewable vs non-renewable
- Pakistan energy MCQs
- Environmental impacts