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UPSC CSE Prelims Physics — Principles & Applications Flashcards

Master 59 physics — principles & applications concepts for the UPSC CSE Prelims.

Mechanics, Heat & Sound

12 cards

Question

Match Newton's Laws of Motion to their core conceptual principles:

The First Law defines the concept of , the Second Law provides the quantitative measure of force as , and the Third Law establishes the principle of .

Question

Consider the following statements regarding the acceleration due to gravity ('g'):

  1. It decreases with an increase in altitude.
  2. It is maximum at the equator and minimum at the poles.

Which of the statements given above is/are correct?

Optics, Electricity & Magnetism

12 cards

Question

Consider the following statements regarding the reflection of light:

  1. The angle of incidence is always equal to the angle of reflection.
  2. This law applies exclusively to plane mirrors and not to curved spherical mirrors.

Which of the statements given above is/are correct?

Question

Identify the optical principles and phenomena associated with the bending of light.

The phenomenon of occurs when light bends at the interface of two transparent media, a process governed mathematically by . A common natural consequence of this phenomenon in hot atmospheres is a .

Nuclear & Modern Physics

8 cards

Question

Identify the nature of the three primary types of radioactive emissions:

In radioactive decay, particles are equivalent to Helium nuclei, particles are high-speed electrons, and rays are high-energy electromagnetic radiation.

Question

Which of the following statements regarding Nuclear Fission is/are correct?

  1. It involves the splitting of a heavy nucleus like Uranium-235.
  2. It is the primary physical process harnessed in modern nuclear power plants.

Simple Machines & Thermodynamics — Depth

10 cards

Question

Consider the following statements regarding Mechanical Advantage (MA):

  1. It is mathematically defined as the ratio of effort applied to the load lifted.
  2. A machine with an MA greater than 1 means the force is multiplied.

Which of the statements given above is/are correct?

Question

Identify the arrangement of components in the three classes of levers.

In a Class 1 lever, the is in the middle (e.g., a seesaw). In a Class 2 lever, the is in the middle (e.g., a wheelbarrow). In a Class 3 lever, the is in the middle (e.g., tongs).

Electromagnetic Spectrum — Band-wise Applications

7 cards

Question

Which of the following medical imaging techniques relies on the electromagnetic band with the longest wavelength?

Question

Discriminate between the EM bands used in common consumer technologies:

Modern wireless communication protocols such as Wi-Fi and Bluetooth primarily operate using . In contrast, everyday line-of-sight devices like television remote controls rely on .

Semiconductors, Fiber Optics, Laser & Superconductivity — Applications

10 cards

Question

Consider the following statements regarding semiconductors:

  1. Silicon and Germanium are fundamental semiconductor elements.
  2. Unlike metals, the electrical conductivity of semiconductors increases with an increase in temperature. Which of the statements given above is/are correct?

Question

Complete the characteristics of a p-type semiconductor:

A p-type semiconductor is created by doping pure Silicon with a impurity. In this material, the majority charge carriers are .

Also study

Biology & Human Health119Space Technology48Chemistry — Concepts & Applications58Defence Technology & DRDO12IT, Communications & Emerging Technology36Scientific Instruments & Everyday Science12Energy Technology & Renewable Energy13Discriminating Confusable Entities — Science & Technology55

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