Hello Aspirants.

Welcome to Online **General Knowledge **section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science**(Physics) !!**

**The Ideal gas equation is**

1.PV = nRT

2.PV = R/T

3.PV = RT

4.PT = VR

5.None of these

Answer – 1.PV = nRT

**Explanation :**

The ideal gas equation is PV=nRT

**The specific heat of water is**

1.1

2.1.5

3.2

4.0.5

5.None of these

Answer –**1.1**

**Explanation :**

The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance.

**According to Kelvin-Planck statement, which of the following is true ?**

1.Conversion of work into heat

2.Conversion of heat into energy

3.Conversion of energy into work

4.Conversion of heat into work

5.None of these

Answer –**4.Conversion of heat into work**

**Explanation :**

The Kelvin–Planck statement of the second law of thermodynamics states that it is impossible to devise a cyclically operating device, the sole effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver an equivalent amount of work

**Heat transfer from a colder body to a hotter body, where both have finite thermal capacity.This is according to**

1.Kelvin statement

2.Ohm Statement

3.Clausius statement

4.Coloumb Statement

5.None of these

Answer –**3.Clausius statement**

**Explanation :**

Clausius statement to rule out heat transfer from a colder body to a hotter body, where both have finite thermal capacity.

**Cavitation is the formation of vapour cavities in a**

1.Acid

2.Gas

3.Soild

4.Liquid

5.None of these

Answer –**4.Liquid**

**Explanation :**

Cavitation is the formation of vapour cavities in a liquid – i.e. small liquid-free zonesthat are the consequence of forces acting upon the liquid.

**Reynolds number is related to**

1.Pressure

2.Velocity

3.Viscosity

4.Density

5.None of these

Answer –**2.Velocity**

**Explantion :**

The Reynolds number is an experimental number used in fluid flow to predict the flow velocity at which turbulence will occur

**Which of the following is true ?**

1.It depends upon atmosphere

2.Hot air is less dense than cool air

3.Hot air balloon not rises

4.Hot air is more dense than cool air

5.None of these

Answer –**2.Hot air is less dense than cool air**

**Explanation :**

The hot air balloon rises because hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air.

**The ground state binding energy of positronium is half of that of**

1.Hydrogen

2.Oxygen

3.Nitrogen

4.Helium

5.None of these

Answer –**1.Hydrogen**

**Explanation :**

Positronium (Ps) is a system consisting of an electron and its anti-particle.The ground state binding energy of positronium is half of that of Hydrogen.

**One Dyne is equal to**

1.10^{−4}N

2.10^{−5}N

3.10^{−2}N

4.10^{−1}N

5.None of these

Answer –**2. 10**^{−5}N

**Explanation :**

One dyne is equal to 10^{−5}N or to 10 nsn (nanosthenes) in the old metre–tonne–second system of units.

**……………. is the ratio of the flow inertia to the external field**

1.Reynold Number

2.Boltzmann Constant

3.Avogadro Number

4.Froude Number

5.None of these

Answer –**4.Froude Number**

**Explanation :**

Froude number (Fr) is a dimensionless number defined as the ratio of the flow inertia to the external field

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