Tag: what is energy

Unit of Energy

Unit of Energy: Unit of Energy – The capacity of an agent to do work is known as its energy. The most important forms of energy are mechanical energy, electrical energy and thermal energy. Different units have been assigned to various forms of energy. However, it must be realized that since mechanical, electrical and thermal […]

Sources of Energy

Sources of Energy: Since electrical energy is produced from energy available in various forms in nature, it is desirable to look into the various sources of energy. These Sources of Energy are : (i) The Sun (ii) The Wind (iii) Water (iv) Fuels (v) Nuclear energy. Out of these sources, the energy due to Sun […]

Voltage Current Characteristics

Voltage Current Characteristics: According to their terminal Voltage Current Characteristics, electrical Sources of Energy are categorised into ideal voltage sources and ideal current sources. Further they can be divided into independent and dependent sources. An ideal voltage source is a two-terminal element in which the voltage Vs is completely independent of the current is through […]

Power and Energy

Power and Energy: Power and Energy – Power is the rate of change of energy, and is denoted by either P or p. If certain amount of energy is used over a certain length of time, then where dw is the change in energy and dt is the change in time. We can also write […]