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) !!!
- All planets move around the sun in elliptical orbits having the sun at one foci of the orbit is called ………………….
1.Doppler’s effect
2.Pascal’s law
3.Kepler’s law
4.Hooke’s law
5.None of these
Answer & Explanation
Answer – 3.Kepler’s law
Explanation :
All planets move around the sun in elliptical orbits having the sun at one foci of the orbit is called – Kepler’s law
- The earth rotates on its axis from …………………..
1.North to South
2.West to east
3.East to west
4.South to North
5.None of these
Answer & Explanation
Answer – 2.West to east
Explanation :
The earth rotates on its axis from west to east. This rotation makes the sun and the stars appear to be moving across from East to West.
- Escape velocity is ………….. times the orbital velocity
1.2
2.√3
3.1
4.√2
5.None of these
Answer & Explanation
Answer – 4.√2
Explanation :
Escape velocity is Escape velocity is .√2 times the orbital velocity times the orbital velocity.Escape velocity is the minimum speed needed for an object to “break free” from the gravitational attraction of a massive body. The escape velocity from Earth is about 40,270 km/h
- If strain is longitudinal then the modulus of elasticity is called ,………………………….
1.Bulk Modulus
2.Modulus of Rigidity
3.Young’s modulus
4.Density
5.None of these
Answer & Explanation
Answer – 3.Young’s modulus
Explanation :
Young’s modulus, which is also known as the elastic modulus, is a mechanical property of linear elastic solid materials. It defines the relationship between stress (force per unit area) and strain (proportional deformation) in a material
- The amount of heat given to the system is used up in 2 ways is …………………………
1.Second law of Thermodynamics
2.Zeroth law of Thermodynamics
3.Third law of Thermodynamics
4.First law of Thermodynamics
5.None of these
Answer & Explanation
Answer – 2.First law of Thermodynamics
Explanation :
First law of Thermodynamics – the amount of heat given to the system is used up in 2 ways, first to increase the internal energy and second to do the external work
- Mercury has ………………….. Specific heat
1.Low
2.High
3.Variable
4.Constant
5.None of these
Answer & Explanation
Answer – 1.Low
Explanation :
Mercury has low Specific heat.The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
- The …………………. law of thermodynamics is the outcome of human experience under which heat energy can be converted
1.Second law of Thermodynamics
2.Zeroth law of Thermodynamics
3.Third law of Thermodynamics
4.First law of Thermodynamics
5.None of these
Answer & Explanation
Answer – 1.Second law of Thermodynamics
Explanation :
The Second law of Thermodynamics is the outcome of human experience under which heat energy can be converted into mechanical energy
- Linear expansion mean ………………
1.Expansion in Volume
2.Expansion in Area
3.Expansion in length
4.Expansion in Width
5.None of these
Answer & Explanation
Answer – 3.Expansion in length
Explanation :
Linear expansion means change in one dimension (length) as opposed to change in volume (volumetric expansion).
- Expansion in area is called …………………
1.Cubical Expansion
2.Linear Expansion
3.Superficial Expansion
4.Artificial Expansion
5.None of these
Answer & Explanation
Answer – 3.Superficial Expansion
Explanation :
Expansion in area is called Superficial Expansion
The area thermal expansion coefficient relates the change in a material’s area dimensions to a change in temperature.
- A steel block with a volume of …………….might expand to 1.002 cubic meters when the temperature is raised by 50 K.
1.1 cubic meter
2.1 meter
3.1 centimeter
4.1 milli meter
5.None of these
Answer & Explanation
Answer – 1.1 cubic meter
Explanation :
The volume of a material changes by some fixed fractional amount. For example, a steel block with a volume of 1 cubic meter might expand to 1.002 cubic meters when the temperature is raised by 50 K.
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