Question

Which of the following does not depict the correct link between technology and physics?

• A. Optical fibres $\leftrightarrow$ total internal reflection of light
• B. Nuclear reactor $\leftrightarrow$ nuclear fusion
• C. Electron microscope $\leftrightarrow$ wave nature of electrons
• D. Electric generator $\leftrightarrow$ laws of electromagnetic induction

Answer 1

Answer: (B)

Nuclear reactor $\leftrightarrow$ nuclear fusion

Answer 2

(i) Optical fibre work on the principle of total internal reflection.
(ii) A nuclear reactor is a device in which nuclear fission can be carried out through a sustained and a controlled chain reaction.
(iii) An electron microscope is a form of microscope that uses a beam of electrons instead of beam of light to form a large image of a very small object. It is based on wave nature of light.
(iv) An electric generator is a device used to convert mechanical energy to electrical energy. It is based on the principle of electromagnetic induction. When a coil is rotated about an axis perpendicular to the direction of uniform magnetic field, an induced emf is produced across it.