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PPSC MCQs

Punjab Public Service Commission β€” Complete MCQ Bank

273 Questions
Exam Preparation Guide

How to prepare for PPSC

PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.

Punjab AffairsGeneral KnowledgeCurrent AffairsEnglish
Give special attention to Punjab geography, history and administration alongside the advertised post’s specialist syllabus.
PPSC preparation illustration
121

Which device converts electrical energy into light energy using a glowing filament?

  • ASolar panel
  • BIncandescent bulb
  • CBattery
  • DGenerator
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Correct Answer: Option B β€” Incandescent bulb
Explanation: An incandescent bulb converts electrical energy into light energy by heating a thin filament until it glows though much of the energy is lost as heat rather than light.
Submitted by: PaperMCQs
122

Which everyday application demonstrates the use of static electricity?

  • AA balloon sticking to a wall after rubbing
  • BWater flowing downhill
  • CA ball rolling on a flat surface
  • DIce melting in sunlight
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Correct Answer: Option A β€” A balloon sticking to a wall after rubbing
Explanation: Rubbing a balloon against hair or fabric transfers electrons creating a static charge that allows the balloon to stick to a wall by attracting opposite charges on its surface.
Submitted by: PaperMCQs
123

Which everyday observation illustrates the concept of friction reducing motion efficiency?

  • AA ball bouncing higher each time
  • BRubbing hands together to generate heat
  • CWater boiling faster at high altitude
  • DLight bending through a prism
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Correct Answer: Option B β€” Rubbing hands together to generate heat
Explanation: Rubbing hands together to generate heat illustrates friction as the resistance between surfaces in contact converts kinetic energy into thermal energy producing warmth.
Submitted by: PaperMCQs
124

Which simple machine uses a grooved wheel and rope to lift heavy objects with reduced effort?

  • ALever
  • BScrew
  • CPulley
  • DWedge
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Correct Answer: Option C β€” Pulley
Explanation: A pulley uses a grooved wheel and rope to change the direction of applied force making it easier to lift heavy objects such as in wells cranes and flagpoles.
Submitted by: PaperMCQs
125

Which simple machine is used in a bottle opener to pry open a cap?

  • APulley
  • BLever
  • CScrew
  • DWedge
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Correct Answer: Option B β€” Lever
Explanation: A bottle opener functions as a lever using a fixed pivot point to amplify the force applied allowing easy removal of a bottle cap with minimal effort.
Submitted by: PaperMCQs
126

Which common kitchen tool functions based on the principle of a wedge to separate materials?

  • ASpoon
  • BKnife
  • CFork
  • DWhisk
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Correct Answer: Option B β€” Knife
Explanation: A knife functions based on the principle of a wedge using its thin angled edge to concentrate force and separate materials like food with relatively little applied effort.
Submitted by: PaperMCQs
127

Which type of energy transformation occurs when a battery powers an electric device?

  • AChemical to electrical
  • BMechanical to electrical
  • CLight to electrical
  • DThermal to electrical
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Correct Answer: Option A β€” Chemical to electrical
Explanation: Batteries store chemical energy that is converted into electrical energy through electrochemical reactions occurring between the electrodes and electrolyte inside the battery.
Submitted by: PaperMCQs
128

Which type of energy transformation occurs in a solar panel converting sunlight into usable electricity?

  • AMechanical to electrical
  • BChemical to electrical
  • CLight to electrical
  • DThermal to electrical
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Correct Answer: Option C β€” Light to electrical
Explanation: Solar panels use photovoltaic cells to convert light energy directly into electrical energy through the photovoltaic effect generating usable electricity from sunlight.
Submitted by: PaperMCQs
129

Which everyday material is a poor conductor of heat and is commonly used as cookware handles?

  • AAluminum
  • BCopper
  • CPlastic or wood
  • DSteel
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Correct Answer: Option C β€” Plastic or wood
Explanation: Plastic or wood materials used as cookware handles are poor conductors of heat preventing burns by minimizing heat transfer from hot cooking surfaces to the user's hand.
Submitted by: PaperMCQs
130

Which everyday material is a good thermal insulator commonly used in winter clothing to retain body heat?

  • AMetal
  • BWool
  • CGlass
  • DCopper
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Correct Answer: Option B β€” Wool
Explanation: Wool is a good thermal insulator commonly used in winter clothing because its fibers trap air pockets that slow heat loss helping retain body warmth in cold conditions.
Submitted by: PaperMCQs