1.
The number of base SI units is:
A) 5 B) 6 C) 7 D) 8
Ans: C
2. Dimensional formula of force is:
A) [MLT ²] B) [ML²T ²] C) [MLT ¹] D) [MT ²]
Ans: A
3. One radian is equal to:
A) 57.3° B) 1° C) 180° D) 360°
Ans: A
4. The resultant of two perpendicular vectors is given by:
A) A + B B) A² + B² C) √(A² + B²) D) A – B
Ans: C
5. Newton’s first law is also called:
A) Law of motion B) Law of force C) Law of inertia D) Law of gravity
Ans: C
6. SI unit of force is:
A) dyne B) kg C) newton D) joule
Ans: C
7. Work done is zero when:
A) Force is applied B) No motion occurs C) Body is heavy D) Acceleration is zero
Ans: B
8. Kinetic energy of a body depends on:
A) Speed only B) Mass only C) Mass and velocity D) Height
Ans: C
9. Power is defined as:
A) Work × time B) Work/time C) Force × time D) Force × velocity
Ans: B
10. Centripetal force acts:
A) Away from center B) Toward center C) Upward D) Downward
Ans: B
11. The dimension of momentum is:
A) [MLT ¹] B) [MLT ²] C) [M²LT ²] D) [M L T ]
Ans: A
12. Torque is a vector quantity because it has:
A) Direction only B) Magnitude only C) Both direction and magnitude D) None
Ans: C
13. Value of g at the surface of the earth is:
A) 10 m/s² B) 9.8 m/s² C) 8.9 m/s² D) 9.0 m/s²
Ans: B
14. Newton’s second law gives the definition of:
A) Force B) Energy C) Mass D) Acceleration
Ans: A
15. The unit of pressure is:
A) N B) Nm C) Pascal D) J
Ans: C
16. A projectile follows a path of:
A) Circle B) Ellipse C) Parabola D) Straight line
Ans: C
17. The escape velocity from Earth is approximately:
A) 11.2 m/s B) 112 m/s C) 11200 m/s D) 11.2 km/s
Ans: D
18. The energy stored in stretched spring is:
A) Heat B) Electrical energy C) Kinetic energy D) Elastic potential energy
Ans: D
19. Rotational analog of mass is:
A) Torque B) Moment of inertia C) Angular momentum D) Acceleration
Ans: B
20. In SHM, restoring force is always:
A) Perpendicular to displacement B) In same direction C) Opposite to displacement D) Random
Ans: C
21. Unit of angular velocity is:
A) rad/s B) m/s C) rad/s² D) N.m
Ans: A
22. Bernoulli’s principle is based on:
A) Conservation of mass B) Conservation of pressure C) Conservation of energy D) Conservation of motion
Ans: C
23. Streamline flow is also called:
A) Turbulent B) Laminar C) Irregular D) Circular
Ans: B
24. Viscosity is defined as:
A) Resistance to deformation B) Internal friction of fluid C) Surface tension D) Fluidity
Ans: B
25. The time period of simple pendulum depends on:
A) Mass B) Amplitude C) Length D) None
Ans: C
26. Resonance occurs when:
A) Driving frequency = Natural frequency B) Both are zero C) Driving frequency > natural frequency D) Driving frequency < natural
frequency
Ans: A
27. The speed of sound is maximum in:
A) Solid B) Liquid C) Gas D) Vacuum
Ans: A
28. Intensity of sound is measured in:
A) Watts B) Newton C) dB (decibels) D) Joules
Ans: C
29. Nodes are formed due to:
A) Reflection only B) Refraction only C) Interference D) Diffraction
Ans: C
30. Diffraction is the bending of waves around:
A) Corners B) Screens C) Slits D) Obstacles
Ans: D
31. Light shows both particle and wave nature. This is called:
A) Dual nature B) Reflection C) Diffraction D) Quantum theory
Ans: A
32. In Young’s double slit experiment, bright and dark fringes are due to:
A) Reflection B) Refraction C) Interference D) Diffraction
Ans: C
33. The speed of light in vacuum is:
A) 3 × 10 m/s B) 1.5 × 10 m/s C) 2 × 10 m/s D) 9.8 m/s²
Ans: A
34. Polarization is a property of:
A) Longitudinal waves B) Transverse waves C) Sound D) Heat
Ans: B
35. The focal length of convex lens is:
A) Negative B) Zero C) Positive D) Infinite
Ans: C
36. Magnifying power of simple microscope depends on:
A) Lens material B) Eye lens C) Focal length D) Mirror size
Ans: C
37. The SI unit of temperature is:
A) Celsius B) Fahrenheit C) Kelvin D) Degree
Ans: C
38. Heat is a form of:
A) Mass B) Energy C) Work D) Pressure
Ans: B
39. Zeroth law of thermodynamics deals with:
A) Temperature B) Heat C) Pressure D) Volume
Ans: A
40. Which law explains the working of a thermometer?
A) Newton's law B) Zeroth law C) First law D) Second law
Ans: B
41. First law of thermodynamics is conservation of:
A) Mass B) Volume C) Energy D) Pressure
Ans: C
42. In isothermal process, temperature is:
A) Constant B) Variable C) Increasing D) Decreasing
Ans: A
43. Heat engine converts:
A) Work to heat B) Heat to work C) Fuel to gas D) Pressure to volume
Ans: B
44. The efficiency of Carnot engine depends on:
A) Pressure B) Temperature C) Volume D) Energy
Ans: B
45. Entropy is a measure of:
A) Order B) Energy C) Temperature D) Disorder
Ans: D
46. A body at absolute zero has:
A) Maximum energy B) No energy C) Some energy D) Zero volume
Ans: B
47. Latent heat is the heat required to:
A) Increase temperature B) Change phase C) Heat liquid D) Cool solid
Ans: B
48. Specific heat is defined as:
A) Heat/mass B) Heat/mass×temp C) Heat×mass D) Temp/mass
Ans: B
49. Boiling occurs at:
A) Any temp B) Below freezing C) Constant temp D) When heat stops
Ans: C
50. A black body absorbs:
A) No radiation B) Only light C) All radiation D) Only heat
Ans: C
