At Adda247, we are providing questions for the General Awareness section. Today, in this quiz we shall study Physics Questions. Here’s a blog of the Top 30 Polity Quiz for Competitive Exams. As you know polity questions and answers are a very useful topic for OPSC, OSSC, OSSSC & Other state exams Study and Score great marks in the Exam.
Q1. If a ball is thrown up which of the following doesn’t change?
(a) acceleration.
(b) speed.
(c) potential energy.
(d) distance.
S1. (a)
- When a ball is thrown up, it is constantly under the gravitational acceleration.
- So it’s acceleration will not be change.
Q2. Ohm’s law is valid in case of?
(a) Semiconductor.
(b) conductor.
(c) superconductor.
(d) Insulator.
S2.(b)
- Ohm’s law is valid for conductors.
- According to ohm’s law electric current is proportional to voltage and inversely proportional to resistance.
Q3. Which of the following does not have any effect on velocity of sound?
(a) Pressure.
(b) Temperature.
(c) Humidity.
(d) Density.
S3. (a)
- Velocity of the sound wave depends upon the temperature, density of medium in which it is traveling.
- It also depends on moisture content in medium.
Q4.Knot is a measure of?
(a) The speed of ship.
(b) The curvature of spherical objects.
(C) Solar radiation.
(d) Intensity of earthquake shock.
S4. (a)
- Knot is the unit of Speed which is used to measure the speed of ship’s.
- It is equal to one nautical mile per hour.
Q5. ______ is the mechanical transfer of energy to a system or from a system by an external force on it?
(a) work.
(b)power.
(C) Intensity.
(d) Force
S5. (a)
- Work is the energy which is transferred to or from any body , from or to any external force or system.
Q6. Energy in the foods can be measured in which unit’s?
(a) Kelvin.
(b) Joule.
(c) calorie.
(d) celsius.
S6.(c)
- Energy in the food can be measured in calorie.
- 1 Calorie is defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gran of water 1 degree Celsius.
Q7. What is the unit of frequency?
(a) Decibel.
(b) watt.
(c) Hertz.
(d) Newton.
S7. (C)
- The S.I UNIT of frequency is Hertz.
- 1 Hertz is defined as the one cycle per second.
- It is named after Heinrich Rudolf Hertz.
Q8. The splitting of different colours of light in a prism is?
(a) Reflection of light.
(b) dispersion of light.
(c) Diffraction of light.
(d) Refraction of light.
S8. (b)
These colors are often observed as light passes through a triangular prism. Upon passage through the prism, the white light is separated into it’s component color’s.-red, orange, yellow, green, blue and violet.
The separation of visible light into it’s different colors is known as dispersion.
Q9. The substance having infinite electric resistance are called?
(a) conductor.
(b) Insulator.
(c) Resistor.
(d) Electrolyte.
S9. (b)
- Insulators have very low conductivity near zero and have infinite resistance.
Q10. Who discovered the battery?
(a) Faraday.
(b) Volta.
(C) Maxwell.
(d) Roentgen.
S10. (b)
- In 1799 , Alessandro Volta invented the battery.
First true battery is known as voltaic pile.
Q11. The radiation initially produced in flourescent tube is?
(a) Infrared.
(b) Ultraviolet.
(c) Microwaves.
(d) X-rays.
S11. (b)
Sol-
- Flourescent tube emits ultraviolet radiation. Due to this flourescent tubes cause various health risk to human’s.
Q12. Forged documents are detected by?
(a) Ultraviolet Ray’s.
(b) Infra red Ray’s.
(C) Beta Ray’s.
(d) Gamma Rays.
S12.(a)
- Documents that are authentic , will grow when illuminated by ultraviolet radiation.
Q13. What is the unit of relative density?
(a) kg/m.
(b) kg/m square.
(c) kg/m cube.
(d) It has no unit.
S13. (d)
- Relative density has no unit as it is the ratio of density of substance and density of water.
Q14. What is decibel?
(a) A musical instrument.
(b) Wavelength of noise.
(C) A musical note.
(d) Scale of sound level.
S14. (d)
- Decibel is the unit used to measure the intensity of sound.
Q15. ______ is the mechanical transfer of energy to a system or from a system by an external force on it?
(a) work.
(b)power.
(C) Intensity.
(d) Force
S15. (a)
- Work is the energy which is transferred to or from any body , from or to any external force or system.
Q16. Echo is produced due to?
(a) Reflection of sound.
(b) Refraction of sound.
(c) Resonance.
(d) None of these.
S16.(a)
- Echo is produced due to reflection of sound waves through q large obstacle.
Q17. Which term is not associated with the sound wave?
(a) Hertz.
(b) Decibel.
(c) Candela.
(d) Mach.
S17. (C)
- Candela is the S.I unit of Luminous intensity.
- Hertz , decibel , and Mach all are associated with sound wave.
Q18. Fe has 26 protons in its nucleus. What are the number of electrons in fe 2+ ion?
(a) 24.
(b) 26.
(c) 28.
(d) 13.
S18. (a) 24.
The separation of visible light into it’s different colors is known as dispersion.
Q19. The weakest of all fundamental forces is?
(a) Gravitational force.
(b) Electrostatic force.
(c) Magnetic force.
(d) Nuclear force.
S19. (a)
- Gravity is the weakest is all fundamental forces. Nuclear force is the strongest force.
Q20. The washing machine work’s on the principle of?
(a) Dialysis.
(b) Diffusion.
(C) Reverse osmosis.
(d) Centrifugation.
S20. (d)
- Washing machine work’s on the principle of centrifugation
Q21. If a magnet has third pole, then the third pole is called?
(a) Defective pole.
(b) Consequent pole.
(c) Extra pole.
(d) Arbitrary pole.
S21. (b)
Sol-
- If the magnet has three poles the third pole is known as consequent pole.
Q22. Electric current in a metal wire is due to the flow of?
(a) electrons.
(b) Protons.
(C) ions.
(d) Holes.
S22.(a)
- Due to the movement of free electrons electric current flows in a metal wire.
Q23. What is the unit of relative density?
(a) kg/m.
(b) kg/m square.
(c) kg/m cube.
(d) It has no unit.
S23. (d)
- Relative density has no unit as it is the ratio of density of substance and density of water.
Q24. A current carrying conductor is associated with?
(a) A magnetic field.
(b) An electric field.
(C) An electro magnetic field.
(d) An electro static field.
S24. (a)
- A current carrying conductor produces a magnetic field.
Q25. Who discovered the colour photography?
(a) Robert Boyce.
(b) Enrico Fermi.
(C) John logie Baird.
(d) James clerk Maxwell.
S25. (d)
- The colour photography was discovered by James clerk Maxwell in 1855.
- The first demonstration of colour photography by three colour method was suggested by him in 1855.
Q26. Hydroscope is an instrument that shows changes in?
(a) Sound under Water.
(b) Atmospheric humidity.
(c) Density of liquid.
(d) Elevation of land.
S26. (a)
- Hydroscope- it is used for seeing below the surface of water.
Q27. Which of the following is an example of cantilever beam?
(a) Diving board.
(b) Bridge.
(c) see saw.
(d) common balance.
S27. (a)
- Cantilever beam is anchored or hinged at one end.
- Diving board is an example of Cantilever beam.
Q28. Fe has 26 protons in its nucleus. What are the number of electrons in fe 2+ ion?
(a) 24.
(b) 26.
(c) 28.
(d) 13.
S28. (a) 24.
The separation of visible light into it’s different colors is known as dispersion.
Q29. While catching a ball , a player pulls down his hands to lower the?
(a) Force.
(b) Momentum.
(c) Impulse.
(d) Catching time.
S29. (b)
- When a player catches a ball , he lowers his hand to lower the rate of change of momentum.
Q30. First man to go into space was?
(a) Roald Amundsen.
(b) Reynalt Mayor.
(C) Robert Peary.
(d) Major yuri Gagarin.
S30. (d)
- Yuri Gagarin was the first man to travel into space.
- He was the Russian Soviet pilot.
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