Advertisements
Advertisements
प्रश्न
Write the problems associated with hydroelectric power projects.
Write two problems associated with hydroelectric power plant.
Advertisements
उत्तर
- The back-water due to storage of water in a dam may submerge villages or towns in that area. This leads to the problems of rehabilitation of the displaced population. Moreover, this can also submerge forests as well as fertile land.
- The obstruction of the flow of river water may have an adverse effect on the living world in the river.
संबंधित प्रश्न
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
Of what material are the control rods of a nuclear reactor made?
If 25 atomic mass units (u) of a radioactive material are destroyed in a nuclear reaction, how much energy is released in MeV?
What is the source of energy of the sun and other stars?
How does inserting the control rods in the graphite core affect the fission in the reactor? Explain your answer.
What is a nuclear reactor? What is the fuel used in a nuclear reactor?
Nuclear fission reactions are not a source of energy for one of the following. This is:
(a) atom bomb
(b) power plants
(c) sun
(d) pacemaker
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
Identify the particle c and the number x of such particles produced in the reaction.
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
State two conditions under which such a reaction takes place.
A nuclear reaction is represented by the equation:
`""_1^2H+_1^2H->_2^3He+xc+E`
What type of nuclear bomb is based on similar reactions?
The mass numbers of four elements A, B, C and D are 2, 20, 135 and 235, respectively. Which one of them will be most suitable to make:
a hydrogen bomb?
Which one of the following statements about alpha and beta particles is
correct?
What do you understand by radioactive decay? An isotope of Uranium `""_92^238 "U"` is radioactive and changes into Thorium 92 by the emission of an alpha particle. Write a symbolic equation for this decay process.
Complete the following nuclear change:
\[\ce{^24_11 Na -> ...Mg.... + ^0_-1β}\]
An imaginary radioactive element `"_92X^235` decays to form X1; X2; X3; X4; X5 and X6 nuclides, by ejecting two β-particles, followed by α-particles and again two β-particles, followed by α-particle. Represent the various nuclear changes in the form of an equation. State the mass number and atomic number of X6. List the isotopes and isobars in the above nuclear equation.
What changes occur in the nucleus of a radioactive element when it emits an alpha particle? Show by an example?
When an alpha particle gains two electrons it becomes neutral and becomes an atom of an element which is a rare gas. What is the name of this rare gas?
State charge and mass of β-particle.
Explain briefly what changes take place within the nuclei when beta particles are emitted by a radioactive substance.
Nuclear power plants in India
