Physics General Science GK - 🌍The Hindi Biography✍🏻

#1. Which of the following waves exhibits the Doppler effect?

None

Both a and b

Sound waves

Electromagnetic waves

#2. Which of the following statements concerning transverse mechanical waves is true?

they can travel through solids and liquids

they can travel through solids but not liquids

they can travel through solids and gases

they can travel through gases but not solids

#3. What is the order of distance for active Vander Wall forces?

10–9 metre

10–8 metre

10–6 metre

10–7 metre

#4. What is the name given to the greatest velocity of a fluid in a tube while the flow stays streamlined?

laminar velocity

critical velocity

Hyper velocity

stream velocity

#5. When are two particles considered to be in the same phase?

if the phase difference between them is an even multiple of π

if the path difference is an even multiple of (λ / 2)

All of the above

if the time interval is an even multiple of (T/ 2)

#6. The phenomenon of elevating the outer edge of curving roadways over the inner edge to give the necessary centripetal force to cars in order for them to make a safe turn is known as _____.

elevation of roads

banking of roads

cornering of roads

tempering of roads

#7. The average kinetic energy of an ideal gas's molecules is directly proportional to__:

Velocity of Molecules

Mass of Molecules

Absolute temperature of the gas

Temperature of environment

#8. Who created the mercury barometer?

Daniel Bernoulli

Blaise Pascal

Albert Einstein

Evangelista Torricelli

#9. Which of the following are electrochemical cells?

Both a and b

Galvanic cells

None of the above

Electrolytic cells

#10. According to Coulomb's law, which of the following is true regarding the force between two point charges?

inversely as the square of the distance between the charges

directly proportional to the product of the magnitude of the two charges

Both a and b

None of the above

#11. A radioactive material does not change (in mass or charge) during__:

gamma-emission

oxidation

alpha-emission

beta-emission

#12. Which of the following statements regarding Pressure is true?

Pressure is a scalar quantity but obeys vector laws

Pressure is a vector quantity

None of the above

Pressure is a scalar quantity

#13. The average kinetic energy of molecules in an ideal gas is exactly proportional to__:

it cooks the food at low pressure

higher temperature is attained for cooking

boiling point decreases with rise of pressure

the material of the cooker is a good conductor

#14. Which of these is referred to as a Universal logic gate?

Both a and b

NAND

NOT

NOR

#15. What is the term for the ratio of radiant energy absorbed by a body at a particular time to total radiant energy incident on it at the same moment?

Absorptive power

Thermal strain

Radiation limit

Coefficient of volume expansion

#16. How much does Planck's constant weigh?

6.6 × 10–34 J s

3.6 × 10–34 J s

6.6 × 10–24 J s

6.6 × 10–17 J s

#17. How dense is the entire blood at STP?

5.55 × 103 kg m–3

3.57 × 103 kg m–3

2

1.06 × 103 kg m–3

#18. What is the name given to the effort done to transport a unit charge from one location to another?

Resistance

Current

Potential Difference

Conductance

#19. What is the link between Kelvin scale (T) and Celsius scale (tc) temperature?

T = tc – 273.15

T = tc + 100

T = tc – 100

T = tc + 273.15

#20. What is the name given to the effort done to transport a unit charge from one location to another?

Conductance

Resistance

Potential Difference

Current

#21. Which of the following is NOT an application of the floatation principle?

None of the above

Ships

Submarines

Balloons

#22. Which of the following is more beneficial to energy conservation?

Fluorescent tube light

LED bulb

Compact fluorescent lamp

Incandescent bulb

#23. How fast are electromagnetic waves in a vacuum?

300000 m/s

3 x 108 m/s

Different for different waves

1000 m/s

#24. The direction of heat flow is determined by ______.

Temperature

Density

Mass

Energy

#25. Which of the following intermolecular forces allows us to write with chalk on a blackboard?

both a and b

Cohesive force

Adhesive force

None

#26. What is the main cause of capillarity?

velocity gradient

difference in weight of fluids

pressure difference

temperature difference

#27. If two vectors are equal, they are said to be equivalent.

only their directions are same

only their magnitudes are same

both magnitude and direction are same

magnitudes are same but directions are opposite

#28. According to the second rule of thermodynamics, which of the following is correct?

None of the above

Efficiency of a heat engine can never be unity

Efficiency of a heat engine is always unity

Efficiency of a heat engine can never be zero

#29. Why is a little liquid drop spherical?

due to hydrogen bonding

due to low viscosity

due to low density

due to surface tension

#30. Which of the following indicates the entire momentum imparted to a surface by an electromagnetic wave?

2 x Total energy transferred/Speed of light

None of the above

Total energy transferred/ 2 x Speed of light

Total energy transferred/Speed of light

#31. Which of these is a material used to make semiconductor devices?

Silicon

Germanium

All of the above

Gallium Arsenide

#32. What do we name a motion that repeats itself after a certain amount of time?

Rotational Motion

Linear Motion

Periodic Motion

Rotary Motion

#33. Which of the following laws indicates that the total current entering and exiting a junction is the same?

Kirchhoff’s First Law

Hooke’s Law

Ohm’s Law

Lenz’s Law

#34. What is the length of the pendulum of a second?

1.5 meter

2 meter

99.3 cm

98.5 cm

#35. Which of the following statements concerning a body's motion around a circular route is correct?

Uniform velocity, variable acceleration

Uniform speed, uniform velocity

Uniform speed, variable acceleration

Uniform speed, variable velocity

#36. The ENT doctor's head mirror is__:

Convex

Plane

Concave

Plano-convex

#37. An object's weight on the moon is equivalent to ______ of its weight on Earth.

1/8th

1/6th

1/4th

1/10th

#38. What exactly is a flawlessly black body?

A body which has zero absorptive power

A body which absorbs all the radiations incident on it

A body which has zero coefficient of linear expansion

A body painted black on all sides

#39. Which of these rays has the most ionising potential?

All have the same

Alpha

Beta

Gamma

#40. What is the name of the equipment used to measure the flow rate of an incompressible?

Venturi-meter

Torri-meter

Hydro-meter

Bernoulli-meter

#41. What is radioactivity's SI unit?

decibel

ampere

cobolt

becquerel

#42. What impact does decreasing the distance between the source of the sound and the listener have on perceived frequency?

it remains same

it increases

None of the above

it decreases

#43. Which of the following is the unit of sound intensity measurement?

Knots

Candela

Decibels

Ampere

#44. What causes a cannon to recoil after firing?

Conservation of energy

Newton’s first law of motion

Backward thrust of gases produced

Newton’s third law of motion

#45. The entire momentum imparted to a surface by an electromagnetic wave is represented by which of the following?

None of the above

Total energy transferred/Speed of light

Total energy transferred/ 2 x Speed of light

2 x Total energy transferred/Speed of light

#46. Which of the following statements regarding a cell's EMF is true?

it is the drift velocity of the electrons when there is no current in the cell

None of the above

it is the potential difference between the electrodes when there is no current in the cell

it is the potential difference between the electrodes when current is flowing in the cell

#47. The function of a fluorescent light choke is__:

to decrease the resistance

to decrease the current flow

to increase the current flow

ro decrease the voltage momentarily

#48. What is the contact angle between pure water and glass?

90°

30°

0°

180°

#49. What do we term the phenomena of light being deflected while passing from one medium to another obliquely?

Dispersion

Reflection

Convergence

Refraction

#50. Why is the velocity of sound higher in moist air than in dry air?

more pressure than dry air.

less density than dry air.

less pressure than dry air.

more density than dry air.

Results

#1. Which of the following waves exhibits the Doppler effect?

#2. Which of the following statements concerning transverse mechanical waves is true?

#3. What is the order of distance for active Vander Wall forces?

#4. What is the name given to the greatest velocity of a fluid in a tube while the flow stays streamlined?

#5. When are two particles considered to be in the same phase?

#6. The phenomenon of elevating the outer edge of curving roadways over the inner edge to give the necessary centripetal force to cars in order for them to make a safe turn is known as _____.

#7. The average kinetic energy of an ideal gas's molecules is directly proportional to__:

#8. Who created the mercury barometer?

#9. Which of the following are electrochemical cells?

#10. According to Coulomb's law, which of the following is true regarding the force between two point charges?

#11. A radioactive material does not change (in mass or charge) during__:

#12. Which of the following statements regarding Pressure is true?

#13. The average kinetic energy of molecules in an ideal gas is exactly proportional to__:

#14. Which of these is referred to as a Universal logic gate?

#15. What is the term for the ratio of radiant energy absorbed by a body at a particular time to total radiant energy incident on it at the same moment?

#16. How much does Planck's constant weigh?

#17. How dense is the entire blood at STP?

#18. What is the name given to the effort done to transport a unit charge from one location to another?

#19. What is the link between Kelvin scale (T) and Celsius scale (tc) temperature?

#20. What is the name given to the effort done to transport a unit charge from one location to another?

#21. Which of the following is NOT an application of the floatation principle?

#22. Which of the following is more beneficial to energy conservation?

#23. How fast are electromagnetic waves in a vacuum?

#24. The direction of heat flow is determined by ______.

#25. Which of the following intermolecular forces allows us to write with chalk on a blackboard?

#26. What is the main cause of capillarity?

#27. If two vectors are equal, they are said to be equivalent.

#28. According to the second rule of thermodynamics, which of the following is correct?

#29. Why is a little liquid drop spherical?

#30. Which of the following indicates the entire momentum imparted to a surface by an electromagnetic wave?

#31. Which of these is a material used to make semiconductor devices?

#32. What do we name a motion that repeats itself after a certain amount of time?

#33. Which of the following laws indicates that the total current entering and exiting a junction is the same?

#34. What is the length of the pendulum of a second?

#35. Which of the following statements concerning a body's motion around a circular route is correct?

#36. The ENT doctor's head mirror is__:

#37. An object's weight on the moon is equivalent to ______ of its weight on Earth.

#38. What exactly is a flawlessly black body?

#39. Which of these rays has the most ionising potential?

#40. What is the name of the equipment used to measure the flow rate of an incompressible?

#41. What is radioactivity's SI unit?

#42. What impact does decreasing the distance between the source of the sound and the listener have on perceived frequency?

#43. Which of the following is the unit of sound intensity measurement?

#44. What causes a cannon to recoil after firing?

#45. The entire momentum imparted to a surface by an electromagnetic wave is represented by which of the following?

#46. Which of the following statements regarding a cell's EMF is true?

#47. The function of a fluorescent light choke is__:

#48. What is the contact angle between pure water and glass?

#49. What do we term the phenomena of light being deflected while passing from one medium to another obliquely?

#50. Why is the velocity of sound higher in moist air than in dry air?

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