Question

Match the "Technology" given in List-1 with the "Principle of Physics" given in List-2.

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-II, B-IV, C-III, D-I
• D. A-II, B-I, C-III, D-IV

Hint:

When answering matching questions, try to match the items you are most certain about first. This can often help you eliminate incorrect options and narrow down the possibilities for the remaining items.

Answer 1

The Correct Option is B

Let's match each technology in List-1 with its underlying physical principle from List-2.
A. Steam engine: The operation of a steam engine, which converts heat energy into mechanical work, is governed by the Laws of thermodynamics. So, A matches with II.
B. Electron microscope: This device uses a beam of electrons to create a highly magnified image. Its ability to resolve very small details depends on the de Broglie wavelength of the electrons, which is a manifestation of the Wave nature of electrons. So, B matches with III.
C. Non-reflecting coatings: These are thin films applied to lenses and other optical surfaces to reduce reflection. They work by creating destructive Interference of light waves, where reflected waves from the top and bottom surfaces of the coating cancel each other out. So, C matches with IV.
D. Tokamak: This is a device designed to harness nuclear fusion energy. It uses powerful magnetic fields to contain a very hot plasma in a toroidal shape. This process is known as Magnetic confinement of plasma. So, D matches with I.
The correct matching is A-II, B-III, C-IV, D-I.