1. Which quantity is the same across all unit systems?
a) Acceleration due to gravity
b) Specific gravity
c) Pressure
d) Density
Answer: b
2. Light-year is a unit used to measure:
a) Speed of aircraft
b) Speed of rockets
c) Astronomical distances
d) Speed of light
Answer: c
3. The boiling point of water decreases at high altitudes due to:
a) Lower temperature
b) Reduced atmospheric pressure
c) Increased temperature
d) Higher atmospheric pressure
Answer: b
4. Which among the following is most elastic?
a) Rubber
b) Wet clay
c) Steel
d) Plastic
Answer: c
5. Which of the following is NOT a vector quantity?
a) Speed
b) Displacement
c) Torque
d) Velocity
Answer: a
6. When climbing a hill, a vehicle’s gear ratio is:
a) Equal to 1
b) Less than 1
c) Greater than 1
d) Equal to or greater than 1
Answer: d
7. A person standing on one foot instead of two experiences pressure that is:
a) Four times greater
b) The same
c) Half
d) Twice as much
Answer: d
8. Why do liquid drops take spherical shape?
a) Surface tension
b) Vapor pressure
c) Density
d) Viscosity
Answer: a
9. Which is a scalar quantity?
a) Velocity
b) Force
c) Angular momentum
d) Electrostatic potential
Answer: d
10. If Earth’s radius shrinks by 1% and mass remains constant, the value of ‘g’ at the surface will:
a) Increase by 0.5%
b) Increase by 2%
c) Decrease by 0.2%
d) Decrease by 2%
Answer: b
11. What causes cream to separate when milk is churned vigorously?
a) Frictional force
b) Centrifugal force
c) Centripetal force
d) Gravitational force
Answer: b
12. Which is a vector quantity?
a) Momentum
b) Pressure
c) Energy
d) Work
Answer: a
13. A bird flying inside a hanging cage affects the spring balance reading by:
a) Keeping it unchanged
b) Reducing it
c) Increasing it
d) None of these
Answer: b
14. Which method can determine mass in a space station?
a) Extension of spring
b) Oscillation period
c) Both
d) Neither
Answer: d
15. FM transmission is less affected by noise because:
a) It resists frequency variation
b) Amplitude remains constant
c) Frequencies don’t vary
d) Frequencies can’t be modulated
Answer: a
16. Parsec is a unit of:
a) Distance
b) Time
c) Light intensity
d) Magnetic flux
Answer: a
17. Which of these is not needed to calculate pressure at the base of a liquid column?
a) Height of liquid column
b) Base surface area
c) Liquid density
d) Acceleration due to gravity
Answer: b
18. A person tosses a coin in a moving train and it falls behind. This implies the train is:
a) Accelerating
b) Moving on circular tracks
c) Retarding
d) Moving uniformly
Answer: a
19. A drop of liquid contracts and minimizes its surface area due to:
a) Surface tension
Answer: a
20. Distance travelled in curved path at constant speed implies acceleration is:
a) Zero
b) Parallel to velocity
c) At arbitrary angle
d) Perpendicular to velocity
Answer: d
21. The motion of a car at 60 km/h on a straight road is:
a) Due to driving force
b) Opposed by resistive force
c) Inclined force driven
d) Resultant force is zero
Answer: d
22. A girl stands on a swing instead of sitting; the time period will:
a) Decrease
b) Increase
c) Remain unchanged
d) Vary randomly
Answer: a
23. When milk is vigorously stirred, cream separates due to:
a) Centrifugal force
Answer: b
24. Four fundamental forces include gravity, electromagnetism, weak and strong nuclear forces. Which statement is incorrect?
a) Gravity is the strongest
b) Electromagnetism acts on charged particles
c) Weak force causes radioactivity
d) Strong force binds protons/neutrons
Answer: a