Dc- direct current has steady nature,ie it's ammount is constant but reduced as source (say- battery) discharge we can get such power from static cell direct current never cross zero level of voltage and current, (either 0v and +v or 0v and -v)(same for current) alternating current cross 0 level in. Alternating current is harder to explain than direct current the electricity is not provided as a single, constant voltage, but rather as a sinusoidal (sine) while simple direct current circuits are generally described only by their voltage, alternating current circuits require more detail first of all, if the. Batteries, fuel cells and solar cells all produce something called direct current (dc) the positive and negative terminals of a battery are always, respectively the big advantage that alternating current provides for the power grid is the fact that it is relatively easy to change the voltage of the power. Direct current is usually obtained from batteries, chargers, solar cells, and dc generators dc is usually used for powering electronic devices like laptops and cellular phones alternating current is usually described, but not limited to, sinusoidal waveforms.
A direct current (dc) is a flow of charges around a circuit in the same direction all the time batteries supply dc and most appliances need dc to function alternating current (ac) is a flow of charges around a circuit that reverses its direction at regular intervals, usually many times a second.
Direct current and alternating current have different advantages and disadvantages that make them useful for different applications most consumer electronic devices, like cellphones, flat screen tvs and even electronic cars, operate with direct current if it runs off of battery, if it plugs into an ac wall. This video defines direct current and alternating current and explains how each works. Both currents have their special features with advantages and are used in different devices as well while dc is unidirectional and flows in one direction only ac is the type of current that is supplied to provide electricity to homes and businesses the reason why it is chosen over dc is because of its.
before discussing about the alternating current and direct current lets look what electricity means elecricity is voltage and current a source with respect to the other terminal is the voltage types of current there are two types of current :i alternating current ii. Both alternating current and direct current are evident in cities across the globe cities are mass consumers of electricity which contain millions if not in conclusion, alternating and direct currents both have their advantages and disadvantages no one current can be better than another mainly. Alternating current and direct current are the two main forms of charges powering our electric and electronic world if you have heard the names ac and dc for the first time, then this sciencestruck article will be very helpful in introducing the basic concepts about these power sources. Alternating current when current keeps reversing direction, it is called alternating current (ac) you can see how it works in the two diagrams below power plants provide alternating current explore more at the following url, watch the video comparing direct and alternating current.
Alternating currents (ac) is exactly the opposite of direct currents (dc) this type of current flows in two directions and is more efficient than direct current (dc) similar to how dc was developed, ac was also developed with the use of magnets. In this section you can learn and practice electronics questions based on alternating current vs direct current and improve your skills in order to face the interview, competitive examination and various entrance test (cat, gate, gre, mat, bank exam, railway exam etc) with full confidence. Direct current vs alternating current in order to power all our devices and appliances, we need power this is generated by power plants and are delivered to us in a variety of ways.
Direct current it is flow of charges in only one direction it is invented by thomas edison in 19th span it is used in charging batteries as well as it is produced by solar system used now days electric appliances with alternating current are preferred because they are available in low cost and are. A direct current flows in one direction only in a circuit the magnitude of a direct current may be (a) constant (b) changes with time an alternating current can flow through both a resistor and a capacitor whereas a direct current can flow through a resistor only.