We know, if F force is applied to area A perpendicularly, Pressure P = F ፥ A From this equation, as the area decreases, pressure increases. The head of the pin is very small and sharp, hence the area is very less. Thus, by applying small force, large pressure can be created. That’s why it … Read more
How nuclear energy is created? Nuclear chain reaction is controlled in the nuclear reactor. Atomic energy is used to create electricity in this machine. Generally, in the nuclear plant, Uranium is used. Uranium-235 is divided spontaneously into atoms having lower atomic mass. At that time, energy is exerted and high-velocity neutrons are exerted. One of … Read more
What is meant by 200 MeV? 200 MeV is the amount of work done by releasing an electron from a point of 200 MeV potential. 200 MeV = 200 ⨯ 106 eV = 200 ⨯ 106 ⨯ 1.6 ⨯ 10-19 J = 3.2 ⨯ 10-11 J
Explain the transformation of light energy to electric energy. If the light is incident on a photovoltaic cell, free electrons exert by absorbing energy which initiates current flow. This flow can be used directly or can be used later by charging the battery.
What is meant by fossil fuel? Animal and plant bodies after being beneath the ground for millions of years converted into coal, natural gas or oil. These sources of energy are known as fossil fuels. That’s why light is one kind of energy.
Light is one kind of energy – explain. Source of every energy is the sun. Oil, Coal, Natural gas, etc. fossil fuels are created from stored light energy in the animal and plant cells. By converging light energy using lens or mirror fire can be created. Besides, solar water heater, solar cooker are outcomes of … Read more
If a spring is compressed, which energy it acquires? When a spring is compressed it changes its state from normal to compressed. Hence, it acquires potential energy. This energy can later be converted into kinetic energy or the spring can do any work equivalent to this energy.
If you pull a book from the ground to the table, which type of work is it for your force? If I pull a book from the ground to the table, for my force, the work is positive. We know, if the displacement occurs along the direction of the applied force, then it is positive … Read more