electricity supply demand

The electric power line enters our house through three wires. One is called the earth wire or ground wire. This carries no electricity. The earth wire is connected to a large metal plate buried deep in the ground. The remaining two wires carry electricity. One of these..

Domestic Electric Circuit - Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during transm..

Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during transmission. For a given electric..

>The earth wire is much thicker in size and is made of copper. One end of it is connected to a copper plate buried deep under the earth. The earth connection is made to the electric meter and then to the main switch. In our homes, we receive supply of electric power th..

Rating of Electrical Appliances - Generally electrical appliances such as an electric bulb, geyser, heater, etc. are rated with power and voltage. A bulb rated as 100W - 250V, means that when a bulb is lit on a 250V supply, it consumes 100 W of electrich..

07. - Two identical cells of EMF 1.5 V each joined in parallel provide supply to an external circuit consisting of two resistors of 17 W each joined in parallel. A very high resistance voltmeter reads the terminal voltage of the cell to be 1.4 V. What is the internal resistance of each ce..

In healthy individuals, the ECG remains reasonably constant, even though the heart rate changes with the demands of the body. The electrical activity of the heart shows changes under the following situations. a) Change in ionic environment of the heart b) A defect in the conduct..

Platinum is required as catalyst in oxygen-hydrogen fuel cells. The demand of platinum exceeds the supply. This will cause problems for fuel cells, which are highly promising energy source for automobile..

The demand for electricity varies at different times of a year. One big disadvantage is that the wind, waves and tides do not occur at all time and hence cannot guarantee steady production of electricity. Hydroelectric power stations can solve this problem. When ..

Advantages - The demand for electricity varies at different times of a year. One big disadvantage is that the wind, waves and tides do not occur at all time and hence cannot guarantee steady production of electricity. Hydroelectric power stations can solve this problem..