Mathematical Example: Efficiency
An electric motor is used to lift a body of weight l0 N at a height 5m. It uses electrical energy of 65 J a)…
Physics
Define Efficiency in terms of Physics
We fulfill our daily needs with the help of transformation of energy. For example we run an engine by transforming chemical energy stored in petrol…
Mathematical Example: Power
A person of mass 70 kg can stair up 30 steps of 25 cm height each in 15 s. What is his power? Here, Mass…
Define Unit of Power in terms of Physics
We can get the unit of power by dividing the unit of work with that of time. Since the unit of work is joule (J)…
Define Power in Terms of Physics
We all are familiar with the word power. In our daily life power is usually related to taking decision and implementation. In science the word…
Explain Principle of Conservation of Energy
Energy can be transformed form one form to another or more forms. The total energy of the universe is constant and unchangeable. Transformation of energy:…
Explain Transformation of Energy
Energy is being transformed continuously from one form to another. Various incidents are taking place in this universe due to transformation of energy. Though energy…
What is Nuclear Energy?
Electricity can be produced by using the energy produced in nuclear reaction. The nuclear reaction from which the obtained energy is used to produce electricity…
What is Biomass Energy?
Wind flows due to the difference of temperature in the earth surface. Kinetic energy due to the air flow can be transferred into electric energy.…
What is Solar Energy?
The energy that we obtain from the sun is called Solar Energy. It is known to all that the sun is the source of all…
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