⚓100 Physics MCQs pak navy test preparation for civilian
1. What is the SI unit of length?
- a) Kilogram
- b) Meter ✅
- c) Second
- d) Ampere
2. Which instrument measures the volume of a liquid?
- a) Vernier calipers
- b) Measuring cylinder ✅
- c) Screw gauge
- d) Balance
3. The rate of change of displacement is called?
- a) Speed
- b) Velocity ✅
- c) Acceleration
- d) Force
4. If a car moves at 60 km/h for 2 hours, the distance covered is?
- a) 30 km
- b) 120 km ✅
- c) 60 km
- d) 180 km
5. Newton’s First Law of Motion is also called?
- a) Law of inertia ✅
- b) Law of momentum
- c) Law of acceleration
- d) Law of action-reaction
6. The formula for force is?
- a) F = m/a
- b) F = m × a ✅
- c) F = v × t
- d) F = p × t
7. The turning effect of a force is called?
- a) Momentum
- b) Torque ✅
- c) Power
- d) Energy
8. What is the unit of torque?
- a) Joule
- b) Watt
- c) Newton-meter ✅
- d) Pascal
9. The center of gravity of a uniform circular ring lies?
- a) At its circumference
- b) Outside the ring
- c) At its center ✅
- d) None of these
10. Which of the following is a scalar quantity?
- a) Force
- b) Velocity
- c) Speed ✅
- d) Acceleration
🔹 Kinematics & Motion
11. What does the slope of a distance-time graph represent?
- a) Acceleration
- b) Speed ✅
- c) Force
- d) Momentum
12. A body moving at 20 m/s accelerates at 5 m/s² for 2 seconds. Its final velocity is?
- a) 10 m/s
- b) 25 m/s
- c) 30 m/s ✅
- d) 40 m/s
13. What is the acceleration of a freely falling object near Earth’s surface?
- a) 0 m/s²
- b) 9.8 m/s² ✅
- c) 10 m/s²
- d) 2.5 m/s²
🔹 Forces & Newton’s Laws
14. Newton’s Second Law states that force equals:
- a) Mass × Velocity
- b) Mass × Acceleration ✅
- c) Weight × Gravity
- d) Momentum × Time
15. The SI unit of force is?
- a) Joule
- b) Newton ✅
- c) Watt
- d) Pascal
16. Which law explains the recoil of a gun when fired?
- a) Newton’s First Law
- b) Newton’s Second Law
- c) Newton’s Third Law ✅
- d) Law of Gravitation
🔹 Work, Energy & Power
17. Work done is zero if the angle between force and displacement is?
- a) 0°
- b) 45°
- c) 90° ✅
- d) 180°
18. The kinetic energy of an object depends on its?
- a) Mass and volume
- b) Mass and speed ✅
- c) Weight and height
- d) Density and pressure
19. What is the commercial unit of electrical energy?
- a) Joule
- b) Watt
- c) Kilowatt-hour (kWh) ✅
- d) Ampere
🔹 Waves & Sound
20. The speed of sound is highest in?
- a) Air
- b) Water
- c) Steel ✅
- d) Vacuum
21. Frequency is measured in?
- a) Decibels
- b) Hertz (Hz) ✅
- c) Meters
- d) Watts
22. Which property of a wave increases with loudness?
- a) Wavelength
- b) Frequency
- c) Amplitude ✅
- d) Speed
🔹 Light & Optics
23. The bending of light as it passes through a prism is called?
- a) Reflection
- b) Refraction ✅
- c) Diffraction
- d) Dispersion
24. A convex lens always forms a virtual image if the object is placed?
- a) At focus
- b) Between focus and optical center ✅
- c) Beyond 2F
- d) At infinity
25. The SI unit of luminous intensity is?
- a) Candela ✅
- b) Lux
- c) Lumen
- d) Watt
🔹 Electricity & Magnetism
26. Ohm’s Law relates voltage (V), current (I), and?
- a) Power (P)
- b) Resistance (R) ✅
- c) Charge (Q)
- d) Energy (E)
27. Which material is the best conductor of electricity?
- a) Rubber
- b) Wood
- c) Copper ✅
- d) Glass
28. A magnet’s strongest force is concentrated at its?
- a) Center
- b) Poles ✅
- c) Sides
- d) Entire surface
🔹 Properties of Matter
29. The SI unit of pressure is?
- a) Newton
- b) Pascal ✅
- c) Joule
- d) Watt
30. Hooke’s Law relates stress to?
- a) Volume
- b) Strain ✅
- c) Density
- d) Temperature
31. Which state of matter has the highest density?
- a) Gas
- b) Liquid
- c) Solid ✅
- d) Plasma
🔹 Thermal Physics
32. Heat transfer through empty space occurs by?
- a) Conduction
- b) Convection
- c) Radiation ✅
- d) Expansion
33. The boiling point of water in Kelvin scale is?
- a) 100 K
- b) 273 K
- c) 373 K ✅
- d) 0 K
34. Which metal is the best conductor of heat?
- a) Aluminum
- b) Copper
- c) Silver ✅
- d) Iron
🔹 Nuclear Physics
35. The process of splitting heavy nuclei is called?
- a) Fusion
- b) Fission ✅
- c) Radiation
- d) Decay
36. Which radiation has the highest penetrating power?
- a) Alpha
- b) Beta
- c) Gamma ✅
- d) X-rays
37. The half-life of a radioactive element is the time for?
- a) Complete decay
- b) Half the atoms to decay ✅
- c) Temperature to halve
- d) Radiation to double
🔹 Circular Motion & Gravitation
38. Centripetal force acts?
- a) Away from center
- b) Toward the center ✅
- c) Tangentially
- d) Upwards
39. The value of gravitational acceleration ‘g’ on Earth’s surface is approximately?
- a) 1.6 m/s²
- b) 9.8 m/s² ✅
- c) 10.2 m/s²
- d) 12 m/s²
40. Kepler’s First Law states planetary orbits are?
- a) Circular
- b) Elliptical ✅
- c) Parabolic
- d) Hyperbolic
🔹 Fluid Dynamics
41. Bernoulli’s principle relates pressure to?
- a) Fluid speed ✅
- b) Fluid color
- c) Fluid mass
- d) Fluid temperature
42. The hydraulic lift works based on?
- a) Archimedes’ Principle
- b) Pascal’s Law ✅
- c) Hooke’s Law
- d) Newton’s Law
43. An object floats when its weight is?
- a) Greater than buoyant force
- b) Equal to buoyant force ✅
- c) Less than buoyant force
- d) Zero
🔹 Modern Physics
44. The particle nature of light is demonstrated by?
- a) Diffraction
- b) Photoelectric effect ✅
- c) Refraction
- d) Polarization
45. Einstein’s mass-energy equivalence is expressed as?
- a) F=ma
- b) E=mc² ✅
- c) PV=nRT
- d) V=IR
46. The uncertainty principle was proposed by?
- a) Newton
- b) Einstein
- c) Heisenberg ✅
- d) Bohr
🔹 Measurement & Units
47. Which instrument measures electric current?
- a) Voltmeter
- b) Ammeter ✅
- c) Ohmmeter
- d) Galvanometer
48. One nanometer equals?
- a) 10⁻³ m
- b) 10⁻⁶ m
- c) 10⁻⁹ m ✅
- d) 10⁻¹² m
49. The vernier scale improves measurement precision by?
- a) Magnifying objects
- b) Adding decimal places ✅
- c) Increasing range
- d) Reducing friction
🔹 Electronics
50. A semiconductor with extra electrons is called?
- a) N-type ✅
- b) P-type
- c) Insulator
- d) Conductor
51. Which component stores electric charge?
- a) Resistor
- b) Capacitor ✅
- c) Transistor
- d) Diode
52. In a diode, current flows?
- a) Both directions
- b) One direction ✅
- c) No direction
- d) Randomly
🔹 Astrophysics
53. The closest star to Earth is?
- a) Alpha Centauri
- b) Sirius
- c) Sun ✅
- d) Polaris
54. A light-year measures?
- a) Time
- b) Distance ✅
- c) Brightness
- d) Energy
55. Black holes have extremely strong?
- a) Electric fields
- b) Magnetic fields
- c) Gravitational pull ✅
- d) Radiation
🔹 Practical Physics
56. A manometer measures?
- a) Velocity
- b) Pressure ✅
- c) Temperature
- d) Humidity
57. The critical angle is the angle of incidence that produces?
- a) Maximum reflection
- b) 90° refraction ✅
- c) Total internal reflection
- d) Dispersion
58. A transformer works on the principle of?
- a) Electromagnetic induction ✅
- b) Electrostatic induction
- c) Photoelectric effect
- d) Thermionic emission
🔹 Miscellaneous Concepts
59. The law of conservation states energy cannot be?
- a) Created or destroyed ✅
- b) Measured
- c) Converted
- d) Stored
60. The color sequence in a rainbow is?
- a) Random
- b) ROYGBIV ✅
- c) Reverse of VIBGYOR
- d) Only primary colors
61. A real image can be captured on?
- a) Mirror
- b) Lens
- c) Screen ✅
- d) Water surface
🔹 Advanced Applications
62. SONAR uses?
- a) Radio waves
- b) Sound waves ✅
- c) Light waves
- d) X-rays
63. The working principle of a rocket is based on?
- a) Archimedes’ Principle
- b) Newton’s Third Law ✅
- c) Pascal’s Law
- d) Bernoulli’s Principle
64. Fiber optics work using?
- a) Refraction
- b) Total internal reflection ✅
- c) Diffraction
- d) Scattering
🔹 Historical Discoveries
65. Who discovered X-rays?
- a) Marie Curie
- b) Wilhelm Röntgen ✅
- c) Thomas Edison
- d) Nikola Tesla
66. The law of floating bodies was discovered by?
- a) Galileo
- b) Archimedes ✅
- c) Pascal
- d) Newton
67. The concept of gravity was introduced by?
- a) Einstein
- b) Newton ✅
- c) Copernicus
- d) Kepler
🔹 Environmental Physics
68. The ozone layer protects Earth from?
- a) UV radiation ✅
- b) Infrared
- c) Microwaves
- d) Radio waves
69. The main greenhouse gas is?
- a) Oxygen
- b) Nitrogen
- c) Carbon dioxide ✅
- d) Helium
70. Solar panels convert sunlight into?
- a) Heat energy
- b) Chemical energy
- c) Electrical energy ✅
- d) Mechanical energy
🔹 Measurement Techniques
71. A micrometer measures?
- a) Current
- b) Small lengths ✅
- c) Temperature
- d) Pressure
72. A spectrometer measures?
- a) Sound intensity
- b) Light wavelengths ✅
- c) Electric charge
- d) Magnetic fields
73. A barometer measures?
- a) Wind speed
- b) Atmospheric pressure ✅
- c) Humidity
- d) Temperature
🔹 Space Physics
74. The Milky Way is a?
- a) Solar system
- b) Galaxy ✅
- c) Constellation
- d) Nebula
75. The planet with the most moons is?
- a) Earth
- b) Jupiter
- c) Saturn ✅
- d) Neptune
76. A comet’s tail points?
- a) Toward the Sun
- b) Away from the Sun ✅
- c) Randomly
- d) Toward Earth
🔹 Energy Resources
77. Which is a non-renewable energy source?
- a) Solar
- b) Wind
- c) Coal ✅
- d) Hydropower
78. The energy stored in a dam is?
- a) Kinetic
- b) Potential ✅
- c) Thermal
- d) Nuclear
79. Nuclear power plants use?
- a) Fusion
- b) Fission ✅
- c) Combustion
- d) Evaporation
🔹 Scientific Instruments
80. A stethoscope detects?
- a) Heartbeats ✅
- b) Brain waves
- c) Muscle movement
- d) Bone density
81. A telescope’s main function is to?
- a) Magnify distant objects ✅
- b) Measure temperature
- c) Detect radiation
- d) Analyze chemicals
82. A hygrometer measures?
- a) Pressure
- b) Humidity ✅
- c) Density
- d) Viscosity
🔹 Physics in Daily Life
83. A refrigerator works by?
- a) Heating the interior
- b) Removing heat ✅
- c) Adding cold
- d) Circulating air
84. The principle behind a microwave oven is?
- a) Conduction
- b) Radiation ✅
- c) Convection
- d) Induction
85. Why are car tires grooved?
- a) Reduce weight
- b) Increase friction ✅
- c) Improve speed
- d) Enhance appearance
🔹 Final Challenge Questions
86. Quantum physics deals with?
- a) Large objects
- b) Subatomic particles ✅
- c) Planetary motion
- d) Fluid dynamics
87. The Pauli Exclusion Principle applies to?
- a) Photons
- b) Electrons ✅
- c) Sound waves
- d) Water molecules
88. The Standard Model explains?
- a) Classical mechanics
- b) Fundamental particles ✅
- c) Thermodynamics
- d) Relativity
89. Dark matter is detected through its?
- a) Light emission
- b) Gravitational effects ✅
- c) Electric charge
- d) Magnetic field
90. The Large Hadron Collider studies?
- a) Black holes
- b) Particle collisions ✅
- c) DNA structure
- d) Ocean currents
91. String theory suggests particles are?
- a) Waves
- b) Tiny strings ✅
- c) Points
- d) Loops
92. The holographic principle relates?
- a) Gravity and quantum theory ✅
- b) Light and sound
- c) Energy and mass
- d) Space and time
93. Quantum entanglement describes?
- a) Particle bonding
- b) Instant connection ✅
- c) Energy transfer
- d) Matter formation
94. The multiverse theory proposes?
- a) One universe
- b) Parallel universes ✅
- c) Expanding space
- d) Time loops
95. The anthropic principle states?
- a) Universe is random
- b) Universe suits life ✅
- c) Earth is unique
- d) Time is relative
96. The Fermi Paradox questions?
- a) Dark energy
- b) Alien absence ✅
- c) Quantum effects
- d) Gravity’s nature
97. The Drake Equation estimates?
- a) Star formation
- b) Alien civilizations ✅
- c) Galaxy count
- d) Black hole size
98. The Wow! signal was?
- a) First radio message
- b) Possible alien signal ✅
- c) Quantum discovery
- d) Cosmic background
99. The Kardashev Scale measures?
- a) Planetary size
- b) Civilization advancement ✅
- c) Star brightness
- d) Galaxy rotation
100. The final physics frontier is considered to be?
- a) Quantum gravity ✅
- b) Nuclear fusion
- c) Space travel
- d) AI development
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