The energy equivalent of 0.5 g of a substance is:
- $4.5 \times 10^{16} J$
- $4.5 \times 10^{13} J$
- $1.5 \times 10^{13} J$
- $0.5 \times 10^{13} J$
The Correct Option is B
Solution and Explanation
$E=mc^{2}$
$=0.5\times 10^{-3}\times 9\times 10^{16}$
$=4.5 \times 10^{13}\,J$
Top Questions on Nuclear physics
Match the following types of nuclei with examples shown:
- KCET - 2025
- Physics
- Nuclear physics
- For a nucleus of mass number $ A $ and radius $ R $, the mass density of the nucleus can be represented as:
- JEE Main - 2025
- Physics
- Nuclear physics
- For a nucleus of mass number $A$ and radius $R$, mass density $\rho$. Then choose the correct option.
- JEE Main - 2025
- Physics
- Nuclear physics
- For a nucleus of mass number $ A $ and radius $ R $, mass density is $ \rho $. Then choose the correct option.
- JEE Main - 2025
- Physics
- Nuclear physics
- Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The binding energy per nucleon is found to be practically independent of the atomic number \( A \), for nuclei with mass numbers between 30 and 170. Reason (R): Nuclear force is long range. In the light of the above statements, choose the correct answer from the options given below:
- JEE Main - 2025
- Physics
- Nuclear physics
Questions Asked in NEET exam
- Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is :
- NEET (UG) - 2024
- work, energy and power
The following graph represents the T-V curves of an ideal gas ( where T is the temperature and V the volume) at three pressures P1, P2 and P3 compared with those of Charles's law represented as dotted lines.
Then the correct relation is :- NEET (UG) - 2024
- Ideal Gases
- In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x (kcal m-2)yr-1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
- NEET (UG) - 2024
- Ecosystems
- 1 gram of sodium hydroxide was treated with 25 ml. of 0.75 M HCI solution, the mass of sodium hydroxide left unreacted is equal to
- NEET (UG) - 2024
- Structural Representations Of Organic Compounds
In the given figure, which component has thin outer walls and highly thickened inner walls?
- NEET (UG) - 2024
- Cell Wall
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.