Physics - MOST IMPORTANT Delhi Police Previous Year Questions
Practice real questions from previous year exams of Delhi Police.
📘 Instruments to Measure things📚 List of Instruments to Measure Physical Quantities
Q1
What technique is used in cell biology research for imaging cellular organelles and surface topography?
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📘 Current Electricity📚 Electric Current
Q2
Seema switched on an electric circuit and went away to drink some water. She came back after 2 minutes and noticed that the circuit had 2.5 A of current flowing through it. The net charge that had flown through the circuit is:
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📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q3
Who described Archimedes' method of finding the specific gravity of substances using a balance in the treatise ‘The Little Balance’?
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📘 Scientists and their Inventions📚 Inventors and Inventions
Q4
Who among the following physicists wrote an autobiography ‘Autobiographical Notes’?
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📘 Thermal Properties of Matter📚 Change of Phase between Solids and Liquids- Freezing and Melting
Q5
The melting point of a solid is defined as:
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📘 Human Eye📚 Working of the Human Eye
Q6
From where does most of the refracted light rays enter the eyes?
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📘 Force and Motion📚 Newton's Second Law of Motion
Q7
The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force. This is known as:
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📘 Force and Motion📚 Physical Quantities related to Motion- acceleration, displacement, etc.
Q8
A kangaroo ran 150 m in the first 40 seconds and then, it ran 100 m in the next 10 seconds. Still, its displacement was only 50 m. The average speed of the kangaroo is:
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📘 Human Eye📚 Working of the Human Eye
Q9
Identify the word that means the minimum distance at which objects can be seen most distinctly without strain.
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📘 Atomic and Nuclear Physics📚 Atoms- Electrons, Protons, Neutrons
Q10
Which of the following elements has the highest atomic number?
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📘 Scattering of Light📚 Applications of Scattering of Light
Q11
Rahul decided to take a walk through a forest early in the morning. While he was inside the dense forest, he could see the beautiful sunrays through the small gaps within trees and clearly see the path taken by those rays. Of which effect was this a result?
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📘 Electrostatics📚 Basic Properties of Electric Charge- Quantization, Additive nature, etc.
Q12
With reference to electric charges, identify the INCORRECT statement.
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📘 Atomic and Nuclear Physics📚 Radioactivity
Q13
Becquerel, which is equal to one disintegration per second (dps) is represented by which symbol?
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📘 Thermal Properties of Matter📚 Misc
Q14
The kinetic energy of the constitute molecules of the matter is minimum for its:
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📘 Human Eye📚 Working of the Human Eye
Q15
What kind of image does the eye lens form of the object on the retina?
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📘 Scientists and their Inventions📚 Inventors and Inventions
Q16
Which physicist is known for extensive research in ‘radiation phenomena’ and the discovery of polonium and radium?
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📘 Thermal Properties of Matter📚 Change of Phase between Solids and Liquids- Freezing and Melting
Q17
Upon application of heat energy, the atoms of an ice cube start vibrating. At one point, the atoms have so much energy that they break away from their fixed position and loose the fixed structure. We can see this as the formation of water. What is this particular point called?
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📘 Wave📚 Mechanical Wave: Transverse waves
Q18
The horizontal distance between two adjacent crests or troughs is known as the __________.
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📘 Atomic and Nuclear Physics📚 Atoms- Electrons, Protons, Neutrons
Q19
What is the molecular mass of an ozone molecule?
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📘 Magnetism📚 Ammeter
Q20
The students in a physics lab have been asked to measure the amount of electric current in a circuit. Which device should they use?
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