University of Delta, Agbor General Physics 1 Test Past Question

PHYSICS PAST QUESTIONS AND ANSWERS

 

1. Which fundamental law of motion is called the law of inertia?

   - A. Newton's second law

   - B. Newton's third law

   - C. Newton's first law

   - D. Law of Momentum

   - Answer: C. Newton's first law

2. Capillary action is due to the phenomenon of:

   - A. Friction

   - B. Surface tension

   - C. Expansion

   - D. Pressure

   - Answer: B. Surface tension

3. Find the pressure due to the fluid at a depth of 0.76m in still water (ρw=1000kg/m3, g=9.8m/s2):

   - A. 7.45kPa

   - B. 7.45Pa

   - C. 74.5kPa

   - D. 745Pa

   - Answer: A. 7.45kPa

4. The property by which a body returns to its original size and shape when the forces that deformed it are removed is:

   - A. Elasticity

   - B. Capillarity

   - C. Viscosity

   - D. None of the above

   - Answer: A. Elasticity

5. Which of the following is/are correct about the kinetic theory of matter?

   - A. All the molecules of a particular element are identical

   - B. The molecules make perfectly elastic collisions with one another

   - C. The molecules are very small about 10^-10m in decimeter

   - D. All of the above

   - Answer: D. All of the above

6. Echo can be used to:

   - A. Find the depth of the sea

   - B. Explore gas and oil

   - C. Measure the speed of sound in the air

   - D. All of the above

   - Answer: D. All of the above

7. The sound wave below the frequencies of audible sound is called:

   - A. Audible sound

   - B. Ultrasonic sound

   - C. Infrasonic sound

   - D. None of the above

   - Answer: C. Infrasonic sound

8. Which of the following waves require a medium to travel?

   - A. Light waves

   - B. Sound waves

   - C. Microwaves

   - D. None of the above

   - Answer: B. Sound waves

9. A body moves from rest with a constant acceleration of 5m/s². The distance covered in 5s is:

   - A. 38m

   - B. 62.5m

   - C. 96m

   - D. 124m

   - Answer: B. 62.5m

10. Which of the following is the dimensional formula for Modulus of Elasticity?

    - A. ML^-1 T^-1

    - B. ML^-2 T^-2

    - C. ML^-1 T^-3

    - D. ML^-1 T^-2

    - Answer: D. ML^-1 T^-2

11. Which of the following is not an example of simple harmonic motion?

    - A. Oscillation of a mass attached to a string

    - B. The oscillation of the strings of a musical instrument

    - C. The oscillation of a loaded test tube floating in water

    - D. All of the above

    - Answer: C. The oscillation of a loaded test tube floating in water

12. A 10m wire is made to stretch to 11.6m by the application of a force. Calculate the tensile strain:

    - A. 16.0

    - B. 0.16

    - C. 1.60

    - D. 0.016

    - Answer: B. 0.16

13. Calculate the pressure due to water at a depth of 20m in water (Take the density of water = 1000kgm⁻³ and acceleration due to gravity = 9.8m/s²):

    - A. 19600 Nm⁻²

    - B. 196000 Nm⁻²

    - C. 1960 Nm⁻²

    - D. 196 Nm⁻²

    - Answer: B. 196000 Nm⁻²

14. The upthrust of an object immersed in a liquid is equivalent to:

    - A. Density x volume x acceleration

    - B. Weight of the object + immersed liquid

    - C. Weight of the fluid displaced

    - D. Volume of the fluid displaced

    - Answer: C. Weight of the fluid displaced

15. Convert 98.6°F to °C:

    - A. 130.6°C

    - B. 66.6°C

    - C. 39°C

    - D. 37°C

    - Answer: D. 37°C

16. If the period of a wave is 4 sec, what is the frequency of the wave?

    - A. 4Hz

    - B. 25Hz

    - C. 0.25Hz

    - D. 40Hz

    

- Answer: C. 0.25Hz

17. The internationally accepted systems of units for physical measurement are:

    - A. kg, cm, sec

    - B. g, m, sec

    - C. g, cm, sec

    - D. kg, m sec.

    - Answer: D. kg, m sec.

18. The following are vector quantities except:

    - A. temperature

    - B. electric field strength

    - C. weight

    - D. force.

    - Answer: A. temperature

19. A force of 10 N acts on a body for 20 seconds. Calculate the impulse of the body?

    - A. 200 Ns

    - B. 100 Ns

    - C. 30 Ns

    - D. 2 Ns.

    - Answer: A. 200 Ns

20. Which of the following moduli is associated with liquids and gases?

    - A. Young

    - B. Stress

    - C. Bulk

    - D. Shear

    - Answer: C. Bulk

21. Calculate the pressure due to water at a depth of 15 m if the density of water is 1000 kg/m³:

    - A. 147 kPa

    - B. 150 kPa

    - C. 280 kPa

    - D. 900 kPa.

    - Answer: A. 147 kPa

22. A radio station sends out a broadcast on a frequency of 800 KHz through radio waves of velocity 3x10⁸m/s. Find the wavelength of the broadcast:

    - A. 375m

    - B. 267m

    - C. 240m

    - D. 187m

 - Answer: A. 375m

23. Shadows and eclipses result from the:

    - A. refraction of light

    - B. reflection of light

    - C. rectilinear propagation of light

    - D. diffraction of light.

    - Answer: C. rectilinear propagation of light

24. Which of the following is the dimensional formula for Modulus of Elasticity?

    - A. ML^-1 T^-1

    - B. ML^-2 T^-2

    - C. ML^-1 T^-3

    - D. ML^-1 T^-2

    - Answer: D. ML^-1 T^-2

25. In elastic collisions:

    - A. Only the total momentum of the colliding objects is conserved.

    - B. Only the total kinetic energy is conserved.

    - C. Both of the momentum and total kinetic energy are conserved.

    - D. Neither the momentum of the colliding bodies nor the total kinetic energy are recoverable.

    - Answer: C. Both of the momentum and total kinetic energy are conserved

26. If extension in spring is proportional to the load applied, then the material obeys :

    - A. Newton's law

    - B. gravitational law

    - C. Charles's law

    - D. Hooke's law

    - Answer: D. Hooke's law

27. Specific weight of sea water is more than that of pure water because it contains ________:

    - A. Dissolved air

    - B. Dissolved salt

    - C. Suspended matter

    - D. All of the above

    - Answer: B. Dissolved salt

28. If the surface of the liquid is convex, the:

    - A. Cohesion pressure is negligible

    - B. Cohesion pressure is decreased

    - C. Cohesion pressure is increased

    - D. None of the above

    - Answer: C. Cohesion pressure is increased

29. When there are no external forces, the shape of a liquid drop is determined by:

    - A. Surface Tension of the liquid

    - B. The density of the liquid

    - C. The viscosity of the liquid

    - D. The temperature of air only

    - Answer: A. Surface Tension of the liquid

30. A drop of oil is placed on the surface of the water. Which of the following statements is correct?

    - A. It will remain on it as a sphere

    - B. It will spread as a thin layer

    - C. It will partly be as spherical droplets and partly as thin films

    - D. It will float at the distorted drop on the water surface.

    - Answer: C. It will partly be as spherical droplets and partly as thin films