Question:
Which of the following does not depict the correct link between technology and physics?
Which of the following does not depict the correct link between technology and physics?
Updated On: May 19, 2022
- Optical fibres $\leftrightarrow$ total internal reflection of light
- Nuclear reactor $\leftrightarrow$ nuclear fusion
- Electron microscope $\leftrightarrow$ wave nature of electrons
- Electric generator $\leftrightarrow$ laws of electromagnetic induction
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The Correct Option is B
Solution and Explanation
(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.
(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.
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Concepts Used:
Nuclear Physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter. Nuclear physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons
Radius of Nucleus
‘R’ represents the radius of the nucleus. R = RoA1/3
Where,
- Ro is the proportionality constant
- A is the mass number of the element
Total Number of Protons and Neutrons in a Nucleus
The mass number (A), also known as the nucleon number, is the total number of neutrons and protons in a nucleus.
A = Z + N
Where, N is the neutron number, A is the mass number, Z is the proton number
Mass Defect
Mass defect is the difference between the sum of masses of the nucleons (neutrons + protons) constituting a nucleus and the rest mass of the nucleus and is given as:
Δm = Zmp + (A - Z) mn - M
Where Z = atomic number, A = mass number, mp = mass of 1 proton, mn = mass of 1 neutron and M = mass of nucleus.