GK Questions: General Science(Physics) – Set 4

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1. The normal temperature of human body is ………………….
1.730C
2.300C
3.370C
4.1000C
5.None of these
Explanation :
Normal body temperature as an oral temperature of 98.6°F (37°C). This is an average of normal body temperatures.

2. Density of water is maximum at ………………………..
1.70C
2.30C
3.40C
4.20C
5.None of these
Explanation :
Density of a substance is defined as the ratio of its mass to its volume
Unit = kg/m3

3. What is the SI unit of pressure ?
1.N/sm2
2.N/m2
3.kg/m2
4.N/m3
5.None of these
Explanation :
Pressure is defined as the force acting normally on unit area of the surface
Unit = N/mor Pascal.A tmospheric pressure is measured by Barometer

4. Slow fall in barometric reading is the indication of ……….
1.Rain
2.Storm
3.Clear Weather
4.Normal Weather
5.None of these
Explanation :
The slow fall in barometric reading is the indication of rain
The slow rise in barometric reading is the indication of clear weather
The sudden fall in barometric reading is the indication of storm

5. The angle of contact is …………. for pure water and clean glass
1.600
2.450
3.900
4.00
5.None of these
Explanation :
The angle of contact is 00 for pure water and clean glass. It is 900 for silver, 80
for ordinary water and 1350 for mercury

6. Which does not require the medium for their propagation ?
1.Electromagnetic waves
2.Transverse Waves
3.Longitudinal Waves
4.Mechanical Waves
5.None of these
Explanation :
Electromagnetic waves do not require medium for their propagation.
Ex – Cathode rays, Alpha and Beta rays

7. Which require the medium for their propagation ?
1.Electromagnetic waves
2.Sound waves
3.Mechanical Waves
4.Shock waves
5.Both 1 and 2
Answer – 5.Both 1 and 2
Explanation :
Mechanical Waves require the medium for their propagation. These are 2 types.They are Longitudinal and Transverse waves

8. The speed of Supersonic wave is measured in ………………….
2.Energy
3.Mach Number
4.Wavelength
5.None of these
Explanation :
Mach number is the ratio of speed of source to the speed of sound
Mach number >1- Supersonic
Mach number >5- Hypersonic
Mach number <1 – Body is moving with supersonic

9. Pyrometer can’t measure the temperature below …………………
1.800 0C
2.500 0C
3.1000 0C
4.750 0C
5.None of these
Explanation :
Pyrometer measure the temperature of a body by measuring the radiation emitted by the body.It can’t measure the temperature below 800 0C

10. Freezing point of Mercury is………………………….
1.-210C
2.-390C
3.-190C
4.390C
5.None of these