What do you understand by a motor’s power is 2 HP? The rate of work done of an object or person is known as the power of that object or person. A motor’s power is 2 HP (Horse Power) or (2⨯746) = 1492 W means that it can do 1492 J work per second.
The advantages of using solar energy. The advantages of using solar energy is there is no possibility of environmental pollution. There is no danger in using this energy. Solar energy is renewable energy.
Why efficiency is written in percentage? Efficiency is written in percentage unit. Efficiency is the ratio of the amount of useful work to the total energy given. From the percentage value of efficiency, we can know how much of the input energy is ultimate of use. Like if an engine has an efficiency of 50%, … Read more
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.
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