A Set of Physics CEE-3

Posted by Nepal Quiz

Friday, 27 December 2024

_Physics

A Set of Physics CEE-3

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1. Which of the following is NOT a vector quantity?

a) Acceleration
b) Force
c) Work
d) Displacement

2. A body is moving with constant acceleration. If its initial velocity is 10 m/s and it travels 100 meters in 5 seconds, what is its acceleration?

a) 2 m/s²
b) 4 m/s²
c) 5 m/s²
d) 6 m/s²

3. The work done by a variable force F(x) along a straight line is given by:

a) $W = \int F(x) dx$
b) $W = \int F(x) dt$
c) $W = F \times x$
d) $W = F \times v$

4. A simple pendulum oscillates with a period $T$. If the length of the pendulum is doubled, its period becomes:

a) $2T$
b) $\sqrt{2}T$
c) $T/\sqrt{2}$
d) $4T$

5. The potential energy of a spring is given by the equation $U = \frac{1}{2} k x^2$, where $k$ is the spring constant. If the spring is stretched by a factor of 2, the potential energy increases by:

a) 2 times
b) 4 times
c) 8 times
d) 16 times

6. The gravitational force between two bodies is proportional to:

a) The product of their masses and the square of the distance between them
b) The sum of their masses and the distance between them
c) The product of their masses and the inverse square of the distance between them
d) The product of their masses and the cube of the distance between them

7. The electric field inside a uniformly charged spherical shell is:

a) Zero
b) Uniform and directed radially inward
c) Uniform and directed radially outward
d) Non-uniform

8. A charge of +2 μC is placed in a uniform electric field of magnitude 500 N/C. The force experienced by the charge is:

a) 100 N
b) 1 N
c) 10 N
d) 5 N

9. If the frequency of a wave is doubled, its wavelength will:

a) Be halved
b) Be doubled
c) Stay the same
d) Be quadrupled

10. A particle moves in a circle of radius $r$ with constant speed $v$. Its centripetal acceleration is given by:

a) $a = \frac{v^2}{r}$
b) $a = \frac{r^2}{v}$
c) $a = \frac{r}{v^2}$
d) $a = \frac{v}{r}$

11. The refractive index of a material is 1.5. What is the angle of refraction if the angle of incidence is 30°?

a) 19.47°
b) 18.43°
c) 20.47°
d) 15.76°

12. The energy of an electron in the first orbit of a hydrogen atom is:

a) $-13.6 \, \text{eV}$
b) $-1.6 \, \text{eV}$
c) $13.6 \, \text{eV}$
d) $1.6 \, \text{eV}$

13. A current of 3 A flows through a conductor for 2 minutes. The total charge that flows through the conductor is:

a) 360 C
b) 600 C
c) 180 C
d) 30 C

14. The period of a wave is the reciprocal of:

a) Frequency
b) Wavelength
c) Speed
d) Amplitude

15. The wavelength of a wave is halved. What happens to its frequency?

a) It is halved
b) It is doubled
c) It remains the same
d) It is quadrupled

16. In a Young's double-slit experiment, the fringe width increases when:

a) The distance between the slits is increased
b) The wavelength of light is decreased
c) The distance between the screen and the slits is increased
d) The light source is changed to red

17. A 10 Ω resistor and a 5 Ω resistor are connected in series. The total resistance of the combination is:

a) 5 Ω
b) 10 Ω
c) 15 Ω
d) 2 Ω

18. The temperature of a gas is doubled while keeping its volume constant. The pressure of the gas will:

a) Remain unchanged
b) Double
c) Quadruple
d) Be halved

19. A charged particle moves in a magnetic field. The force acting on the particle depends on:

a) The velocity of the particle
b) The strength of the magnetic field
c) The angle between the velocity and magnetic field
d) All of the above

20. The work function of a metal is 2.5 eV. If light of wavelength 400 nm falls on the metal, what will be the energy of the emitted electrons?

a) 2 eV
b) 1 eV
c) 0.5 eV
d) 3.1 eV

21. In a diffraction pattern, the distance between two consecutive maxima is $d$. If the wavelength of the light is doubled, the distance between the maxima will:

a) Remain the same
b) Be halved
c) Be doubled
d) Be quadrupled

22. A moving coil galvanometer can be converted into an ammeter by:

a) Connecting a low resistance in parallel
b) Connecting a high resistance in series
c) Connecting a low resistance in series
d) Connecting a high resistance in parallel

23. A conductor carries a current of 10 A. The number of electrons passing through a cross-section of the conductor in 1 second is:

a) $6.25 \times 10^{19}$
b) $6.25 \times 10^{18}$
c) $5.25 \times 10^{19}$
d) $5.25 \times 10^{18}$

24. The focal length of a concave mirror is 20 cm. An object is placed at a distance of 40 cm from the mirror. The image formed is:

a) Real and inverted
b) Virtual and erect
c) Real and erect
d) Virtual and inverted

25. The energy stored in a capacitor is:

a) $E = \frac{1}{2} QV$
b) $E = \frac{1}{2} C V^2$
c) $E = Q^2 C$
d) $E = C \times V$

26. The time period of a simple pendulum is $T$. If the length is tripled, the new time period becomes:

a) $3T$
b) $\sqrt{3}T$
c) $9T$
d) $6T$

27. A transformer is used to step up the voltage from 100 V to 1000 V. If the current in the primary coil is 2 A, what is the current in the secondary coil?

a) 0.2 A
b) 0.02 A
c) 0.5 A
d) 1 A

28. The force between two charges is 9 N. If the distance between them is tripled, the force becomes:

a) 1 N
b) 3 N
c) 9 N
d) 0.33 N

29. The power dissipated by a resistor is directly proportional to:

a) Current
b) Voltage
c) Resistance
d) Both current and voltage

30. The velocity of light in a medium depends on the:

a) Frequency of light
b) Wavelength of light
c) Refractive index of the medium
d) Temperature of the medium

31. A 100 kg mass is moving with a velocity of 5 m/s. Its kinetic energy

is: a) 250 J
b) 500 J
c) 1250 J
d) 2500 J

32. The magnetic field at the center of a current-carrying circular loop is:

a) Zero
b) Directly proportional to the radius
c) Inversely proportional to the radius
d) Directly proportional to the current

33. The critical angle for a light ray passing from water (n = 1.33) to air (n = 1) is approximately:

a) 48°
b) 60°
c) 45°
d) 90°

34. A satellite orbits the Earth at a height $h$ above the surface. The speed of the satellite depends on:

a) $h$ only
b) The radius of the Earth
c) The mass of the satellite
d) Both $h$ and the mass of the Earth

35. The binding energy per nucleon in an atomic nucleus is:

a) Proportional to the mass of the nucleus
b) Inversely proportional to the mass of the nucleus
c) Always constant
d) Independent of the atomic number

36. If the velocity of light in a medium is $v$, then the refractive index of the medium is given by:

a) $\frac{c}{v}$
b) $\frac{v}{c}$
c) $v \times c$
d) $\frac{v}{2c}$

37. The electric field inside a conductor in electrostatic equilibrium is:

a) Non-zero
b) Zero
c) Constant
d) Depends on the charge distribution

38. The intensity of sound is measured in:

a) Decibels
b) Hertz
c) Amperes
d) Joules

39. The magnetic force on a moving charged particle is maximum when:

a) The velocity and magnetic field are parallel
b) The velocity and magnetic field are perpendicular
c) The velocity is zero
d) The magnetic field is zero

40. A transformer works on the principle of:

a) Mutual induction
b) Self-induction
c) Electromagnetic induction
d) Faraday's law

41. In an electromagnetic wave, the electric and magnetic fields are:

a) Perpendicular to each other and to the direction of propagation
b) Parallel to each other and to the direction of propagation
c) Parallel to each other but perpendicular to the direction of propagation
d) Perpendicular to each other and parallel to the direction of propagation

42. The energy required to remove an electron from the outermost shell of an atom is called:

a) Ionization energy
b) Activation energy
c) Binding energy
d) Potential energy

43. The ratio of the velocity of light in a vacuum to its velocity in a medium is called:

a) Refractive index
b) Wavelength
c) Frequency
d) Wave number

44. If a conductor has a resistance of 5 Ω and a current of 2 A passes through it, the potential difference across the conductor is:

a) 2 V
b) 5 V
c) 10 V
d) 15 V

45. The period of a simple pendulum is independent of:

a) Mass of the bob
b) Length of the pendulum
c) Acceleration due to gravity
d) None of the above

46. The rate of heat transfer through a material is inversely proportional to its:

a) Temperature
b) Thermal conductivity
c) Thickness
d) Surface area

47. A 20 W bulb is connected to a 230 V supply. The current passing through the bulb is:

a) 0.087 A
b) 0.1 A
c) 0.15 A
d) 1 A

48. A black body absorbs all wavelengths of light. Its emissivity is:

a) Zero
b) One
c) Half
d) Depends on temperature

49. The capacitance of a parallel plate capacitor is directly proportional to:

a) The area of the plates
b) The distance between the plates
c) The voltage applied
d) The charge on the plates

50. The total energy of a photon is related to its frequency by the equation:

a) $E = h\nu$
b) $E = \frac{h}{\nu}$
c) $E = h \times \nu^2$
d) $E = h\nu^2$

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Answer Key:

1. c) Work
2. a) 2 m/s²
3. a) $W = \int F(x) dx$
4. a) $2T$
5. b) 4 times
6. c) The product of their masses and the inverse square of the distance between them
7. a) Zero
8. c) 10 N
9. a) Be halved
10. a) $a = \frac{v^2}{r}$
11. a) 19.47°
12. a) $-13.6 \, \text{eV}$
13. b) 600 C
14. a) Frequency
15. b) It is doubled
16. c) The distance between the screen and the slits is increased
17. c) 15 Ω
18. b) Double
19. d) All of the above
20. d) 3.1 eV
21. c) Be doubled
22. c) Connecting a low resistance in series
23. a) $6.25 \times 10^{19}$
24. a) Real and inverted
25. b) $E = \frac{1}{2} C V^2$
26. b) $\sqrt{3}T$
27. a) 0.2 A
28. d) 0.33 N
29. d) Both current and voltage
30. c) Refractive index of the medium
31. c) 1250 J
32. c) Inversely proportional to the radius
33. a) 48°
34. d) Both $h$ and the mass of the Earth
35. b) Inversely proportional to the mass of the nucleus
36. a) $\frac{c}{v}$
37. b) Zero
38. a) Decibels
39. b) The velocity and magnetic field are perpendicular
40. a) Mutual induction
41. a) Perpendicular to each other and to the direction of propagation
42. a) Ionization energy
43. a) Refractive index
44. c) 10 V
45. a) Mass of the bob
46. c) Thickness
47. b) 0.1 A
48. b) One
49. a) The area of the plates
50. a) $E = h\nu$