Physics MCQ Quiz Hub

1. Which of the following statements about Pressure and Stress is NOT correct?
Pressure is always normal to the area
Pressure is always compressive in nature
Stress can be normal or tangential to the area
Stress is always compressive in nature

2. On which of these factors the buoyancy depends?
Density of the fluid
Volume of the body
Both a and b
None of the above

3. Which of the following about S.H.M is correct?
In S.H.M. acceleration is maximum at extreme position
In S.H.M. velocity is minimum at extreme position
Both a and b
None of the above

4. What are those oscillations whose amplitude goes on decreasing with time are known as?
Damped oscillation
Maintained oscillation
Free oscillation
Forced oscillation

5. What happens to the frequency of the pendulum if it is suspended from the ceiling of the lift moving downward with acceleration equal to acceleration due to gravity ?
it increases
it decreases
No change
No oscillation

6. What kinds of waves are the ultrasonic waves in air produced by a vibrating quartz crystal?
Transverse
Longitudinal
Transverse and longitudinal
None of the above

7. Which of the following are the areas of application of Dopplers effect?
At airports to guide aircraft
in the military to detect enemy aircraft
Sonography
All of the above

8. Which of the following electromagnetic waves in the EM spectrum has the shortest frequency?
Radio
Gamma
X-rays
Infrared

9. Which of the following waves are also called as heat waves?
UV rays
X-rays
Infrared
Micro waves

10. What do we call the magnitude of the maximum disturbance in the medium on either side of the mean value called as?
Frequency
Angular Displacement
Amplitude
Wave number

11. What is the effect of increase of temperature on the speed of sound?
it increases
it decreases
it may or may not increase
No effect

12. What is supersonic speed?
When the speed of any object exceeds the speed of sound
When the speed of any object exceeds the speed of light
When the speed of any object exceeds 10000 m/s
None of the above

13. What is meant by Calorimetry?
Measurement of heat
Measurement of temperature
Measurement of specific heat capacity
None of the above

14. Which of the following law states that if two systems are in thermal equilibrium with a third system separately then they are in thermal equilibrium with each other?
First law of Thermodynamics
Zeroth law of Thermodynamics
Second law of Thermodynamics
Third law of Thermodynamics

15. Which of the following principles is used to define the First law of Thermodynamics?
Conservation of mass
Conservation of energy
Conservation of momentum
Conservation of charge

16. What do we call the process taking place at constant pressure?
Isochoric
Isobaric
Adiabatic
Isothermal

17. What happens when light travels from a denser medium to a rarer medium?
it slows down and bends towards the normal
it speeds up and bends towards the normal
it slows down and bends away from the normal
t speeds up and bends away from the normal

18. Which of the following is true about the focal length of a spherical mirror?
it is equal to its radius of curvature
t is equal to half its radius of curvature
it is equal to twice its radius of curvature
None of the above

19. Which of the following regions of electromagnetic spectrum is called as light?
100 nm � 1000 nm
400 nm � 10000 nm
100 nm � 20000 nm
400 nm � 750 nm

20. What is the distance between the focus and the pole of the mirror is known as?
Centre of Curvature
Focal length
Mirror number
Radius of curvature

21. Which of the following is a law of reflection?
angle of incidence is equal to the angle of reflection
angle of incidence is equal to twice the angle of reflection
angle of incidence is equal to half of the angle of reflection
angle of incidence is always complimentary to the angle of reflection

22. What is the phenomenon of bouncing back of light in the same medium on striking the surface of any object known as?
Refraction
Absorption
Reflection
Diffusion

23. What do we call the mode of transmission of heat by which heat travels from one part of a body to another by the actual motion of the heated particles of the body?
Conduction
Convection
Radiation
None of the above

24. Which of the following is correct about Convection?
It is possible in solids only
It is possible in fluids only
It is possible in solids and gases only
None of the above

25. Which of the following is the phenomenon responsible for the trade winds?
Convection
Conduction
Radiation
None of the above

26. What do we call the process in which no exchange of heat energy takes place between the gas and the surroundings?
Adiabatic
Isothermal
Isochoric
Isobaric

27. What do we call the process taking place at constant pressure?
Isochoric
Isobaric
Adiabatic
Isothermal

28. Which of the following is true about an ideal gas if Cp =molar specific heat capacities at constant pressure Cp= molar specific heat capacities at constant volume and R is the universal gas constant?
Cp + Cv = R
Cp/ Cv = R
Cp � Cv = R
None of the above

29. What causes the twinkling of stars?
Atmospheric refraction of starlight
Dispersion of starlight
Scattering of starlight
None

30. Which of the following is a law of reflection?
angle of incidence is equal to the angle of reflection
angle of incidence is equal to twice the angle of reflection
angle of incidence is equal to half of the angle of reflection
angle of incidence is always complimentary to the angle of reflection

31. What part of eyes give it a distinctive colour?
Cornea
Iris
Pupil
Retina

32. What do we call a cell that induces a spontaneous redox reaction to create a flow of electrical charges?
Voltaic cell
Electrolytic cell
Such cells dont exist
None of the above

33. Which of the following is NOT a natural magnet?
lodestone
pyrrhotite
columbite
titanium

34. Which of these is used to accelerate charged particles or ions to high energies?
Solenoid
Cyclotron
Electric motor
Toroid

35. What of following is equivalent to 1 a.m.u?
1.660539 x 10-18 kg
1.660539 x 10-21 kg
1.660539 x 10-24 kg
1.660539 x 10-27 kg

36. Which of the following is NOT a natural magnet?
lodestone
pyrrhotite
columbite
titanium

37. Which of these is used to accelerate charged particles or ions to high energies?
Solenoid
Cyclotron
Electric motor
Toroid

38. What of following is equivalent to 1 a.m.u?
1.660539 x 10-18 kg
1.660539 x 10-21 kg
1.660539 x 10-24 kg
1.660539 x 10-27 kg

39. Which of the following diodes is mostly commonly used as a voltage regulator?
LED
Varactor diode
Shockley diode
Zener diode

40. What is the output of an AND gate when both the inputs are 0?
0
1
Either 0 or 1
2

41. Which type of semiconductor do we get when pure silicon is doped with a group-3 element?
n-type semiconductor
p-type semiconductor
Intrinsic semiconductor
None

42. Which of the following is correct about conductors?
The conduction band and the valence band partly overlap each other
There is no forbidden energy band gap between conduction band and the valence band
Both a and b
None of the above