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Showing posts from October, 2019

Voltage

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What is Voltage ? Voltage(V) is a diffrence in electrical potential energy, per unit of charge, between two points. V = Potential energy                Charge Unit Potential energy means potential to do work so energy measures in joules & charge in coulomb. V =     Joule        = volt (v)       Coulomb Simply voltage pushesh electrons around a circuit, without voltage electrons moves freely in any direction. Analogy with water As voltage decreases brightness of bulb decreases because there is less pressure to force electron in the circuit so less light is produced. Another names to Voltage 1) Potential Diffrence 2) EMF 3) Electric pressure 4) Electric tension

Electric current

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Electric current is a electric charge flowing through any section of a conductor in 1 second. Current = charge flow(q)                        Time(t) Current is measure in Ampere how is it ? i.e. Charge is measure in coulomb & time in second so I = c oulomb   =  Ampere (A)        second Current Direction Direction of electric current is always opposite to the flow of electrons.  We konw current is a flow of electrons but how much it flow given below  1 Amp = 6.250 × 10^21  Electrons/second Conductivity Electrical Conductivity involves flow of free electrons from solid body i.e. Copper wire.  Cu having only 1 electron in outershell. If we push free electron in cu wire it will find new atom & the negative charge of that electron will eject another electron from otershell & electron flows from atom to atom.

Non-conventional sources of power

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Power generated by using wind, solar, biomass, tidal & geothermal heat including farm and animal waste as well as human excreta is known as  non - conventional energy . All these  sources  are renewable or inexhaustible and do not cause environmental pollution. More over they do not require heavy expenditure. Types of sources      1) Wind power     2) Solar power     3) Biomass power     4) Tidal wave power     5) Geo thermal power 1) Wind Power   Wi nd  power describes the process by which  wind  is used to generate electricity .  Wind turbines  convert the kinetic  energy  in the  wind  into mechanical power. A generator can convert mechanical power into electricity. 2) Solar Power Solar power is the conversion of energy from sunlight into electricity , either directly using photovoltaics, indirectly using concentrated sola...