Physics is the study of matter and energy and their interactions. It is a fundamental science that is essential for understanding the world around us. Physics is used in a wide variety of fields, including engineering, medicine, and computer science.
This practice test will assess your knowledge of basic physics concepts. The questions are designed to be similar to those that you will encounter on college entrance examinations and the LET.
To do well on this test, you should review your physics notes and textbook. You should also practice solving physics problems.
Direction: Choose the letter of the correct answer.
1. The phenomenon of splitting of light into its constituent colors is known as:
a. Refraction
b. Dispersion
c. Interference
d. Diffraction
2. Which law states that the rate of heat transfer through a material is proportional to the negative gradient in the temperature and the area through which it is transferred?
a. Newton's law of cooling
b. Fourier's law
c. Ohm's law
d. Coulomb's law
3. The principle that the change in the internal energy of a system is equal to the heat transferred to the system minus the work done by the system is a restatement of:
a. The first law of thermodynamics
b. The second law of thermodynamics
c. The zeroth law of thermodynamics
d. The third law of thermodynamics
4. In a simple pendulum, at what position is the potential energy maximum?
a. At the mean position
b. At the extreme position
c. At the midpoint between mean and extreme position
d. It remains constant
5. Which of the following is a dimensionless quantity?
a. Velocity
b. Acceleration
c. Refractive index
d. Force
6. In the phenomenon of wave interference, when a crest meets a trough, it results in:
a. Constructive interference
b. Destructive interference
c. No interference
d. Partial interference
7. What is the magnitude of the gravitational force between two 1-kg masses separated by a distance of 1 meter?
a. 9.8 N
b. 1 N
c. 6.67 x 10^-11 N
d. 0 N
8. What is the primary difference between a DC and an AC circuit?
a. The direction of current flow
b. The amount of current flow
c. The type of devices that can be powered
d. The frequency of current flow
9. A body is moving along a circular path of radius R. What will be the body's acceleration if it completes one revolution in T seconds?
a. Zero
b. R/T
c. 2Ï€R/T²
d. 4Ï€²R/T²
10. What is the SI unit of charge?
a. Ampere
b. Coulomb
c. Volt
d. Ohm
11. A machine is said to have 100% efficiency when:
a. The output work is equal to the input work
b. The output work is less than the input work
c. The output work is more than the input work
d. The machine does no work
12. Why do astronauts in space feel weightless?
a. There is no gravity in space
b. The gravitational force in space is very weak
c. They are in free fall
d. They are moving at very high speeds
13. Which of the following best describes the term 'inertia'?
a. The tendency of a body to maintain its state of rest or uniform motion
b. The force required to accelerate a body
c. The resistance offered by a body to change its position
d. The property of a body to return to its original position after displacement
14. In terms of wavelength, which color of light has the highest energy?
a. Red
b. Blue
c. Green
d. Yellow
15. According to Einstein's theory of relativity, as an object approaches the speed of light, its mass:
a. Decreases
b. Increases
c. Remains the same
d. Becomes infinite
16. What causes the Doppler effect?
a. The motion of the source or observer
b. The frequency of the wave
c. The amplitude of the wave
d. The wavelength of the wave
17. What is the speed of sound in air at room temperature?
a. Approximately 343 m/s
b. Approximately 1235 m/s
c. Approximately 299,792 km/s
d. Approximately 330 km/s
18. What is the phenomenon of a wave bouncing back from a barrier called?
a. Refraction
b. Reflection
c. Diffraction
d. Interference
19. What is the minimum velocity that a body must be given to escape the gravitational field of the earth?
a. Escape velocity
b. Terminal velocity
c. Critical velocity
d. Initial velocity
20. Why does a swimming pool appear less deep than it actually is?
a. Due to reflection of light
b. Due to refraction of light
c. Due to diffraction of light
d. Due to interference of light
21. Which of the following materials is a good conductor of electricity?
a. Wood
b. Plastic
c. Glass
d. Copper
22. The term 'fluid' in physics refers to:
a. Liquids only
b. Gases only
c. Both liquids and gases
d. Neither liquids nor gases
23. The phenomenon of change in the direction of light as it passes obliquely from one medium to another is called:
a. Reflection
b. Refraction
c. Diffraction
d. Dispersion
24. What is the change in momentum called?
a. Force
b. Impulse
c. Power
d. Energy
25. The tendency of a body to resist a change in its state of motion is known as:
a. Force
b. Inertia
c. Momentum
d. Impulse
26. The bending of waves around the edges of a barrier is known as:
a. Reflection
b. Refraction
c. Diffraction
d. Dispersion
27. What is the ability to do work called?
a. Force
b. Power
c. Energy
d. Momentum
28. What is the unit of power?
a. Joule
b. Watt
c. Newton
d. Pascal
29. What type of image is formed on the retina of a human eye?
a. Real and inverted
b. Virtual and inverted
c. Real and erect
d. Virtual and erect
30. What is the measure of the total amount of matter contained in a body?
a. Weight
b. Volume
c. Mass
d. Density
31. The force that opposes the motion of a body rolling or sliding over the surface of another is called:
a. Gravitational force
b. Normal force
c. Frictional force
d. Centripetal force
32. The ability of a body to return to its original shape after it has been stretched or compressed is called:
a. Ductility
b. Malleability
c. Elasticity
d. Plasticity
33. What is the quantity of heat required to change the state of 1 kg of a substance from solid to liquid at its melting point called?
a. Specific heat capacity
b. Latent heat of fusion
c. Latent heat of vaporization
d. Thermal conductivity
34. If the distance between two charges is doubled, the electrostatic force between them:
a. Remains the same
b. Doubles
c. Is halved
d. Is reduced to a quarter
35. What is the SI unit of electric current?
a. Volt
b. Ohm
c. Ampere
d. Watt
36. The energy possessed by a body by virtue of its position or state is called:
a. Kinetic energy
b. Potential energy
c. Mechanical energy
d. Thermal energy
37. The phenomenon of a substance to oppose the flow of electric current through it is called:
a. Resistance
b. Reactance
c. Inductance
d. Capacitance
38. The rate of doing work or the rate of transfer of energy is called:
a. Force
b. Power
c. Energy
d. Momentum
39. In an electric motor, the change of electrical energy into mechanical energy is due to:
a. Faraday's law of electromagnetic induction
b. Fleming's left-hand rule
c. Fleming's right-hand rule
d. Lenz's law
40. The path in a field along which a free body would move is called:
a. Field line
b. Line of force
c. Line of motion
d. None of the above
41. The process by which certain materials produce electric voltage when they are subjected to pressure or tension is known as:
a. Thermoelectric effect
b. Hall effect
c. Seebeck effect
d. Piezoelectric effect
42. What is the mechanical advantage of an inclined plane?
a. The ratio of the length of the slope to the height of the inclined plane
b. The ratio of the weight of the load to the weight of the effort
c. The ratio of the effort distance to the load distance
d. The ratio of the load to the effort
43. Which of the following represents the amount of electric charge that flows past a given cross-section of a conductor in unit time?
a. Voltage
b. Current
c. Resistance
d. Power
44. The property of a body to continue in its state of rest or uniform motion unless acted upon by an external force is described by which law of motion?
a. First law of motion
b. Second law of motion
c. Third law of motion
d. Law of gravitation
45. What is the net force acting on a body moving with constant velocity?
a. Zero
b. Equal to the weight of the body
c. Equal to the mass of the body
d. Dependent on the speed of the body
46. What type of lens is used to correct hypermetropia?
a. Convex lens
b. Concave lens
c. Cylindrical lens
d. Bifocal lens
47. A body is thrown vertically upwards. What will be its velocity at the highest point?
a. Equal to the initial velocity
b. Half the initial velocity
c. Zero
d. Twice the initial velocity
48. A body is in equilibrium when:
a. The net force acting on it is zero
b. The net torque acting on it is zero
c. Both the net force and net torque acting on it are zero
d. It is in uniform motion
49. An electric current flowing in a wire produces around it:
a. An electric field
b. A magnetic field
c. An electromagnetic field
d. None of the above
50. The phenomenon in which the amplitude of forced vibrations matches the natural frequency of an object leading to increased amplitude is known as:
a. Damping
b. Harmonics
c. Resonance
d. Beats
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