Nuclear Fusion

Q.

A mono atomic gas is supplied the heat Q very slowly keeping the pressure constant. The work done by the gas will be

1. 

2. 

3. 

4. 

Q. In the nuclear fusion reaction ${}_1^{2}H{+}_1^{3}H{\to }_2^{4}He+n$ given that the repulsive potential energy between the two nuclei is $7.7\times {10}^{-14}J$, the temperature at which the gases must be heated to initiate the reaction is nearly [Boltzmann's constant $k=1.38\times {10}^{-23}J/K$ ]

1. ${10}^{9}K$
2. ${10}^{7}K$
3. ${10}^{5}K$
4. ${10}^{3}K$

Q. Between two neutrons attractive force can be provided by,

1. Electrostatic and gravitational
2. Electrostatic and nuclear
3. Gravitational and nuclear
4. some type of vander waals force

Q.

Fusion reaction is initiated with the help of

1. Low temperature

2. High temperature

3. Neutrons

4. Any particle

Q. If a star can convert all the He nuclei completely into oxygen nuclei. The energy released per oxygen nuclei is [Mass of He nucleus is 4.0026 amu and mass of oxygen nucleus is 15.9994 amu]. [IIT-JEE-2005]

1. 7.6 MeV
2. 56.12 MeV
3. 10.24 MeV
4. 23.9 MeV

Q. It is proposed to use the nuclear fusion reaction ${}_1^{2}H+{}_1^{2}H\to {}_2^{4}He$ in a nuclear reactor with an electrical power rating of 200 MW. If the energy from the above reaction is used with 25 percent efficiency in the reactor, how many grams of deuterium fuel will be needed per day? (The masses of ${}_1^{2}H$ and ${}_2^{4}He$ are $2.0141\text{amu}$ and $4.0026\text{amu}$ respectively.)

1. $290\text{gm}$
2. $100\text{gm}$
3. $130\text{gm}$
4. $230\text{gm}$

Q.

For a fusion reaction between two light weight nuclei to occur, the Columbic repulsion between them is required to be overcome. This can be done by which of the following way/s ?

1. Increasing the temperature of the sample

2. Decreasing the temperature of the sample

3. Increasing the average kinetic energy of the nuclei to be fused

4. Applying a high electric field