Sunday, September 28, 2014

DC Ciruits and Parrallel and series arrangement

A direct Current  circuit consist of source of direct current electricity, which has conducting wire. Which is usually copper wire, Which is connected to one end of source terminal and back to other terminal in a complete circuit. For  DC Electricity to exist, DC current is required. Remember, Circuit is a loop which is closed and through which current flows. In DC Circuit, Current flows only in one direction. DC Circuit consist of a DC battery and a source i.e a bulb or a flashlight.


Whereas, DC electricity is actually the movement of electrons from area of negative charges to area of positive charges, and charges always travel through some conducting wire i.e mostly copper wire. DC electricity in a circuit consist of voltage, resistance and current.


Electricity moving through a wire consist of voltage (v) and Current (I)  Resistance (R). Voltage is the potential energy stored in a conductor whereas resistance is opposition to the flow of electron, and Current is because of flow of electrons.  Resistance is required in a circuit to control the flow of electricity. Voltages and Current are independent of time in DC Circuits.


If a Capacitor C or Inductor L is added in DC Circuit, now the circuit formed would not be a DC circuit. DC installations would be found in low voltage or extreme low voltage applications such as sockets, and etc and these are usually attached with a battery. if not attached with a battery wouldnt work on low voltages.


Series Circuit:-
                         In this type of circuits, devices are placed in a line or series arrangement such as bulbs so that they are placed between the two positive and negative ends of battery. One side effect of this arrangement is that if one end of battery burns out, it would act like a switch.


Parallel Circuits,:- In this type of circuits , devices are arranged in parallel combination. In this type of combination, if one device such as bulb goes out, other is still in contact. If one bulb burns out, it wont act as a switch. And still other bulb would shine and would electrical wiring in homes is also in parallel. And the major advantages of Parallel circuit is that if one end or one loop fails to respond, it wont lead to the failure of the other terminal or end, similarly more loops can be added without addition of more voltage.


IMPORTANT:-
                          current produced at the water power stations is AC, because it works in cyclic form and is Alternating current, so it is carried to distant places through transformers ,, but DC cant be carried to distant places. When it reaches to our homes, there is a break which controls the effectivity of AC, and send to our homes.
                                   

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