Diode Diode are the electronic components which conducts current in one direction(unidirectional).A PN junction is known as a semiconductor diode. Silicon and germanium are used in manufacturing the diode. The schematic symbol of diode is represented by The arrow in the symbol indicates the direction of easier conventional current flow. A diode has the two … Read more
Wind Energy Electricity Generation Wind is mainly caused due to the solar heating of the atmosphere. Wind as a source of energy is very attractive because it is plentiful, inexhaustible, renewable , and non-pollutant. Wind blows for 320 days in a year and gives an advantage over sunlight. Worldwide five nations Germany, USA, Denmark, Spain … Read more
Photovoltaic or Solar cells Definition: The solar cell is a transducer or semiconductor which converts the suns radiant energy directly into electrical energy and is basically a semiconductor diode capable of developing a voltage of 0.5-1 volt and a current density of 20-40 mA/cm^2 depending upon the the material used and the conditions of sunlight. … Read more
Grading of cables Definitions of Grading of cables There is unequal stress distribution in cable is undesirable for the following reasons: Insulation of greater thickness is required which increases the cable size. Unequal stress distribution may leads to the breakdown of insulation. To overcome this drawbacks it is necessary to have a uniform stress distribution … Read more
Underground cables Underground cables are used to transmit or distribute electric power. Mainly overhead system or underground system are used to transmit or distribute electric power. An underground cable essentially consists of one or more conductors covered with suitable insulation and surrounded by a protecting cover. undergrounds cables has many advantages compared to overhead system … Read more
Tariff Tariff means the schedule of rates or charges. The rate at which electrical energy is supplied to a consumer is known as tariff .Although tariff should include the total cost of producing and supplying electrical energy plus the profit but it cannot be same for all the types of consumers. Tariff is different for … Read more
Economics of Power Generation The generating stations may be steam, hydro, nuclear, diesel or any other type. Steam power stations are best suited near the coal fields and also adopted where coal supply is available in plenty at reasonable rates, large amounts of power is required to be generated and financial, climatic and geographical conditions … Read more
Generation of Electrical Energy The conversion of energy available in different forms in nature into electrical energy is known as generation of electrical energy. Energy available in various forms from different natural sources such as pressure head of water, chemical energy of fuels, nuclear energy of radioactive substances etc. All the forms of energy can … Read more
Voltmeters The devices which measure potential difference in a circuit are called voltmeters. A voltmeter is connected in parallel with the circuit element across which the potential differences is to be measured .The basic principle of ammeter and voltmeter is the same .Both are current operated devices i.e deflecting torque is produced when current flows … Read more
Ammeters Definition: The devices which measures current in a circuit are called ammeters. An ammeter is connected in series with the circuit element whose current is to be measured. The basic principle of the ammeter is that the deflecting torque is produced when current flows through their operating coils. In ammeter the deflecting torque is … Read more