Sunday, 4 July 2021

General Science Quiz -7 (Physics)(#ssc)(#upsc)(#sciencequiz)(#compete4exams)(#eduvictors)

 General Science Quiz -7 (Physics) 

General Science Quiz -7 (Physics)(#ssc)(#upsc)(#sciencequiz)(#compete4exams)(#eduvictors)

Q1: Desalination of seawater is done by using reverse osmosis.

The pressure applied to the solution is 

(a) larger than osmotic pressure

(b) smaller than osmotic pressure

(c) equal to osmotic pressure

(d) equal to atmospheric pressure



Q2: The unit of power is

(a) Hertz 

(b) Volts

(c) Watt 

(d) Neutrons


Q3: Which one of the following dements is used as a timekeeper in atomic clocks?

(a) Potassium 

(b) Caesium

(c) Calcium 

(d) Magnesium



Q4: Which one of the instrument is used for locating submerged objects in an ocean?

(a) Audiometer 

(b) Galvanometer 

(c) Sextant

(d) SONAR



Q5: Why is argon gas used along with tungsten wire in an electric bulb?

(a) To increase the life of the bulb

(b) To reduce the consumption of electricity

(c) To make the emitted light coloured

(d) To reduce the cost of the bulb



Q6: As the train starts moving, the head of the passenger sitting inside leans backward because of

(a) Inertia of Rest

(b) Inertia of Motion

(c) Moment of Inertia 

(d) Conservation of Mass


Q7: When a piece of  pure silver is doped with aluminium, then

(a) the conductivity of the doped silicon piece will remain the same

(b) the doped silicon piece will become n-type

(c) the doped silicon piece will become p-type

(d) the resistivity of the doped silicon piece will increase



Q8: An iron needle floats on the surface of water due to 

(a) Upthrust of water

(b) Surface tension

(c) Viscosity

(d) Gravitational force



Q9: The reason of mirage is

(a) Interference of light

(b) Diffraction of light

(c) Polarisation of light

(d) Total internal reflection of light



Q10: Which one of the following is not a semiconductor?

(a) Silicon 

(b) Germanium

(c) Quartz 

(d) Gallium arsenide



Q11: For which one of the following does the centre of mass lie outside the body?

(a) A fountain pen 

(b) A cricket ball

(c) A ring 

(d) A book




Answer: 

1: (a) larger than osmotic pressure

2: (c) Watt 

3: (b) Caesium

4: (d) SONAR

5: (a) To increase the life of the bulb

6: (a) Inertia of Rest

7: (c) the doped silicon piece will become p-type

8: (b) Surface tension

9: (d) Total internal reflection of light

10: (c) Quartz  (It is an insulator)

11: (c) A ring (Centre of mass of ring is at its centre which is outside its body)


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