Binding Energy

Q.

What is the binding energy of an electron?

Q. If the binding energy per nucleon in
$\begin{array}{c}7\\ 3\end{array}Li$ and $\begin{array}{c}4\\ 2\end{array}He$ nuclei are $5.60\text{MeV}$ and $7.06\text{MeV}$ respectively, then in the reaction $p+\begin{array}{c}7\\ 3\end{array}Li\to 2\begin{array}{c}4\\ 2\end{array}He$, energy of proton must be

1. $28.24\text{MeV}$
2. $17.28\text{MeV}$
3. $1.46\text{MeV}$
4. $39.2\text{MeV}$

Q. A current of $1.34\text{A}$ exists in a copper wire of cross-section $1{\text{mm}}^2$. Assuming that each copper atom contributes one free electron, the drift speed of the free electrons in the wire will be:
$($Density of copper is $8990{\text{kg/m}}^3$, atomic mass is $63.50$ and charge on electron is $1.6\times {10}^{-19}\text{C})$

1. $0.3\text{mm/s}$
2. $0.5\text{mm/s}$
3. $0.1\text{mm/s}$
4. $0.05\text{mm/s}$

Q. The __________ determines how tightly _________ a nucleus is.

1. Binding energy, bound
2. Binding energy per nucleon, bound
3. Binding energy, packed/bound
4. Binding energy per nucleon, packed/bound

Q.

The energy required to separate the nucleons in a nucleus to infinity is called Binding Energy. This is equal to the energy released if the nucleons are brought together from infinity to form the nucleus.

1. True
2. False

Q.

Match the following for a pair of protons:
1. Electrostatic Force I. Attractive
2. Strong Nuclear Force II. Repulsive

1. 1-I, 2-II

2. 1-I, 2-I
3. 1-II, 2-II

4. 1-II, 2-I

Q. A nucleus $\text{X}$ initially at rest, undergoes alpha decay according to the equation,

${}_Z{\text{X}}^{232}\to {}_{90}{\text{Y}}^A+\alpha$

What fraction of the total energy released in the decay will be the kinetic energy of the alpha particle.

1. $\frac{228}{232}$
2. $\frac{90}{92}$
3. $\sqrt{\frac{228}{232}}$
4. $\frac{1}{2}$

Q.

Nuclear binding energy is equivalent to

1. Mass of proton

2. Mass of neutron

3. Mass of nucleus

4. Mass defect of nucleus

Q.

Binding energy of a nucleus is

1. Energy given to its nucleus during its formation

2. Total mass of nucleus converted to energy units

3. Loss of energy from the nucleus during its formation

4. Total K.E. and P.E. of the nucleons in the nucleus