Q6. It is found that if a neutron suffers an elastic collinear collision with a deuterium at rest, the fractional loss of its energy is Pd , while for its similar collision with a carbon nucleus at rest, the fractional loss of energy is Pc . The values of Pd and Pc are respectively (1) 0, 1 (2) 0. 89, 0. 28 (3) 0. 28, 0. 89 (4) 0, 0
What This Question Tests
This question applies the formula for fractional energy loss of an incident particle in a 1D elastic collision, requiring knowledge of the approximate masses of the colliding nuclei.
Concepts Tested
Formulas Used
K_f/K_i = ((m₁ - m₂)/(m₁ + m₂))²
Fractional loss = 1 - (K_f/K_i)
📚 NCERT Sections This Tests
13.5 — The Q Value Of A Nuclear Reaction A + B ® C + D Is Defined By
Physics Class 12 · Chapter 13
13.5 The Q value of a nuclear reaction A + b ® C + d is defined by Q = [ mA + mb – mC – md]c2 where the masses refer to the respective nuclei. Determine from the given data the Q-value of the following reactions and state whether the reactions are exothermic or endothermic. (i) 11 H+13 H →12 H+12 H (ii) 126 C+126 C →1020 Ne+ 24 He Atomic masses are given to be m ( 12 H ) = 2.014102 u m ( 13 H) = 3.016049 u m ( 126 C ) = 12.000000 u m ( 1020 Ne ) = 19.992439 u
12.2 — The Nucleus Of A Hydrogen Atom Is A Proton. The Mass Of It Is
Physics Class 12 · Chapter 12
12.2 The nucleus of a hydrogen atom is a proton. The mass of it is 1.67 × 10–27 kg, whereas the mass of an incident a-particle is 6.64 × 10–27 kg. Because the scattering particle is more massive than the target nuclei (proton), the a-particle won’t bounce back in even in a head-on collision. It is similar to a football colliding with a tenis ball at rest. Thus, there would be no large-angle scattering.
13.3 — A Given Coin Has A Mass Of 3.0 G. Calculate The Nuclear Energy That
Physics Class 12 · Chapter 13
13.3 A given coin has a mass of 3.0 g. Calculate the nuclear energy that would be required to separate all the neutrons and protons from each other. For simplicity assume that the coin is entirely made of 6329Cu atoms (of mass 62.92960 u).
📋 Question Details
- Chapter
- Centre of Mass & Collisions
- Topic
- Elastic collisions, Fractional energy loss
- Year
- 2018
- Shift
- 08 Apr
- Q Number
- Q6
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 7: System of Particles and Rotational Motion
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