R4RIN – MCQs, Mock Tests | Physics General Science

Which of the following statements about Pressure and Stress is NOT correct?

1. Pressure is always normal to the area
2. Pressure is always compressive in nature
3. Stress can be normal or tangential to the area
4. Stress is always compressive in nature

✅ Correct Answer: 4

On which of these factors the buoyancy depends?

1. Density of the fluid
2. Volume of the body
3. Both a and b
4. None of the above

✅ Correct Answer: 3

Which of the following about S.H.M is correct?

1. In S.H.M. acceleration is maximum at extreme position
2. In S.H.M. velocity is minimum at extreme position
3. Both a and b
4. None of the above

✅ Correct Answer: 3

What are those oscillations whose amplitude goes on decreasing with time are known as?

1. Damped oscillation
2. Maintained oscillation
3. Free oscillation
4. Forced oscillation

✅ Correct Answer: 1

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 ?

1. it increases
2. it decreases
3. No change
4. No oscillation

✅ Correct Answer: 4

What kinds of waves are the ultrasonic waves in air produced by a vibrating quartz crystal?

1. Transverse
2. Longitudinal
3. Transverse and longitudinal
4. None of the above

✅ Correct Answer: 2

Which of the following are the areas of application of Dopplers effect?

1. At airports to guide aircraft
2. in the military to detect enemy aircraft
3. Sonography
4. All of the above

✅ Correct Answer: 4

Which of the following electromagnetic waves in the EM spectrum has the shortest frequency?

1. Radio
2. Gamma
3. X-rays
4. Infrared

✅ Correct Answer: 1

Which of the following waves are also called as heat waves?

1. UV rays
2. X-rays
3. Infrared
4. Micro waves

✅ Correct Answer: 3

What do we call the magnitude of the maximum disturbance in the medium on either side of the mean value called as?

1. Frequency
2. Angular Displacement
3. Amplitude
4. Wave number

✅ Correct Answer: 3

What is the effect of increase of temperature on the speed of sound?

1. it increases
2. it decreases
3. it may or may not increase
4. No effect

✅ Correct Answer: 1

What is supersonic speed?

1. When the speed of any object exceeds the speed of sound
2. When the speed of any object exceeds the speed of light
3. When the speed of any object exceeds 10000 m/s
4. None of the above

✅ Correct Answer: 1

What is meant by Calorimetry?

1. Measurement of heat
2. Measurement of temperature
3. Measurement of specific heat capacity
4. None of the above

✅ Correct Answer: 1

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?

1. First law of Thermodynamics
2. Zeroth law of Thermodynamics
3. Second law of Thermodynamics
4. Third law of Thermodynamics

✅ Correct Answer: 2

Which of the following principles is used to define the First law of Thermodynamics?

1. Conservation of mass
2. Conservation of energy
3. Conservation of momentum
4. Conservation of charge

✅ Correct Answer: 2

What do we call the process taking place at constant pressure?

1. Isochoric
2. Isobaric
3. Adiabatic
4. Isothermal

✅ Correct Answer: 2

What happens when light travels from a denser medium to a rarer medium?

1. it slows down and bends towards the normal
2. it speeds up and bends towards the normal
3. it slows down and bends away from the normal
4. t speeds up and bends away from the normal

✅ Correct Answer: 4

Which of the following is true about the focal length of a spherical mirror?

1. it is equal to its radius of curvature
2. t is equal to half its radius of curvature
3. it is equal to twice its radius of curvature
4. None of the above

✅ Correct Answer: 2

Which of the following regions of electromagnetic spectrum is called as light?

1. 100 nm � 1000 nm
2. 400 nm � 10000 nm
3. 100 nm � 20000 nm
4. 400 nm � 750 nm

✅ Correct Answer: 4

What is the distance between the focus and the pole of the mirror is known as?

1. Centre of Curvature
2. Focal length
3. Mirror number
4. Radius of curvature

✅ Correct Answer: 2

Which of the following is a law of reflection?

1. angle of incidence is equal to the angle of reflection
2. angle of incidence is equal to twice the angle of reflection
3. angle of incidence is equal to half of the angle of reflection
4. angle of incidence is always complimentary to the angle of reflection

✅ Correct Answer: 1

What is the phenomenon of bouncing back of light in the same medium on striking the surface of any object known as?

1. Refraction
2. Absorption
3. Reflection
4. Diffusion

✅ Correct Answer: 3

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?

1. Conduction
2. Convection
3. Radiation
4. None of the above

✅ Correct Answer: 2

Which of the following is correct about Convection?

1. It is possible in solids only
2. It is possible in fluids only
3. It is possible in solids and gases only
4. None of the above

✅ Correct Answer: 2

Which of the following is the phenomenon responsible for the trade winds?

1. Convection
2. Conduction
3. Radiation
4. None of the above

✅ Correct Answer: 1

What do we call the process in which no exchange of heat energy takes place between the gas and the surroundings?

1. Adiabatic
2. Isothermal
3. Isochoric
4. Isobaric

✅ Correct Answer: 1

What do we call the process taking place at constant pressure?

1. Isochoric
2. Isobaric
3. Adiabatic
4. Isothermal

✅ Correct Answer: 2

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?

1. Cp + Cv = R
2. Cp/ Cv = R
3. Cp � Cv = R
4. None of the above

✅ Correct Answer: 3

What causes the twinkling of stars?

1. Atmospheric refraction of starlight
2. Dispersion of starlight
3. Scattering of starlight
4. None

✅ Correct Answer: 1

Which of the following is a law of reflection?

1. angle of incidence is equal to the angle of reflection
2. angle of incidence is equal to twice the angle of reflection
3. angle of incidence is equal to half of the angle of reflection
4. angle of incidence is always complimentary to the angle of reflection

✅ Correct Answer: 1

What part of eyes give it a distinctive colour?

1. Cornea
2. Iris
3. Pupil
4. Retina

✅ Correct Answer: 2

What do we call a cell that induces a spontaneous redox reaction to create a flow of electrical charges?

1. Voltaic cell
2. Electrolytic cell
3. Such cells dont exist
4. None of the above

✅ Correct Answer: 1

Which of the following is NOT a natural magnet?

1. lodestone
2. pyrrhotite
3. columbite
4. titanium

✅ Correct Answer: 4

Which of these is used to accelerate charged particles or ions to high energies?

1. Solenoid
2. Cyclotron
3. Electric motor
4. Toroid

✅ Correct Answer: 2

What of following is equivalent to 1 a.m.u?

1. 1.660539 x 10-18 kg
2. 1.660539 x 10-21 kg
3. 1.660539 x 10-24 kg
4. 1.660539 x 10-27 kg

✅ Correct Answer: 4

Which of the following is NOT a natural magnet?

1. lodestone
2. pyrrhotite
3. columbite
4. titanium

✅ Correct Answer: 3

Which of these is used to accelerate charged particles or ions to high energies?

1. Solenoid
2. Cyclotron
3. Electric motor
4. Toroid

✅ Correct Answer: 2

What of following is equivalent to 1 a.m.u?

1. 1.660539 x 10-18 kg
2. 1.660539 x 10-21 kg
3. 1.660539 x 10-24 kg
4. 1.660539 x 10-27 kg

✅ Correct Answer: 1

Which of the following diodes is mostly commonly used as a voltage regulator?

1. LED
2. Varactor diode
3. Shockley diode
4. Zener diode

✅ Correct Answer: 4

What is the output of an AND gate when both the inputs are 0?

1. 0
2. 1
3. Either 0 or 1
4. 2

✅ Correct Answer: 1

Which type of semiconductor do we get when pure silicon is doped with a group-3 element?

1. n-type semiconductor
2. p-type semiconductor
3. Intrinsic semiconductor
4. None

✅ Correct Answer: 2

Which of the following is correct about conductors?

1. The conduction band and the valence band partly overlap each other
2. There is no forbidden energy band gap between conduction band and the valence band
3. Both a and b
4. None of the above

✅ Correct Answer: 3

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