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we can step up different ranch by Alternating current. it is less voltage drop then d.c and a.c current is chi pest then dc current .
AnswerA.C. is more-widely used than d.c. because the voltage level of a.c. is easily increased to high voltages using Transformers. High-voltage is essential for electricity transmission, as it results if a lower load current for a given load -thus reducing voltage drops, and enabling the use of conductors of lower cross-sectional area. However, d.c. is also widely-used for long-distance h.v. transmission, as it has several advantages over a.c. -e.g. less losses, and no synchronisation problems with other systems (making it ideal for international links). So, in some respects, d.c. is better than a.c. over long distances.
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What current has negative and positive polarity?
Alternating current (AC) has both negative and positive polarity as it periodically reverses direction. In AC systems, the voltage oscillates between positive and negative values, which allows electricity to be transmitted efficiently over long distances. This is in contrast to direct current (DC), which flows in only one direction and maintains a constant polarity.
Alternating current is transmitted across large distances at high voltage to minimize what?
Alternating current (AC) is transmitted across large distances at high voltage to minimize power loss due to resistance in the transmission lines. By increasing the voltage, the current flow is reduced for the same amount of power transmitted, which significantly decreases the I²R losses (where I is current and R is resistance). This allows for more efficient long-distance energy transfer and reduces the need for additional infrastructure.
What is Alternate current and direct current?
Direct current commonly known as DC is the current which does not change it's direction of flow, but the magnitude can vary with time where as alternating current known as AC changes it's polarity with time it is not uni directional. the frequency of AC varies but DC donot contain such a feature it's frequency is zero.
Why dc can be stored ac cannot stored?
Why direct current (DC) can be stored but alternating current(AC) can not be? Current means flow of charge per unit second. Any flow cannot be made stationary. Then it is not flow. Hence both direct current and alternating current cannot be stored. We can store only charges. In capacitors we store charges and not current. For storing we use direct supply or direct voltage When a capacitor is connected to a battery, which is a source of direct voltage, each plate of the condenser get charged. Charges remain in the plates. No current flows in between the plates. When the source is removed, there are some charges left in the plates. We say that charges are stored in the plates. If an alternating source of supply is connected in between the plates,every instant ,the charges in the plates are alternating and they are not stationary. When ac supply is removed, all the charges move out of the plates and hence no charge is left in them. Hence charges can be stored with dc supply and not with ac supply. However as long as the ac is connected to the capacitor, the capacitor gets stored and emptied with the frequency of the ac supply.
What does a dc power supply do in a electric motor?
A DC power supply supplies directional current in an electric motor. This is significant because many motors run on directional current, or DC power; it's easier to convert to kinetic energy than alternating current (AC), which is generally used to transmit power over long distances.
Why is alternating current better than direct current for transmitting electricity over long distances?
Alternating current is better than direct current for transmitting electricity over long distances because it can be easily converted to higher or lower voltages using transformers, which reduces energy loss during transmission. Additionally, alternating current can travel longer distances with less power loss compared to direct current.
What is one way that alternative current is more useful than direct current?
alternating current is easier to transfer long distances
Why is alternating current more effective at long-distance travel than direct current?
Alternating current is more effective for long-distance travel than direct current because it can be easily converted to higher voltages, which reduces energy loss during transmission over long distances. This is due to the ability of alternating current to use transformers to increase voltage and decrease current, resulting in lower energy losses compared to direct current.
Why is an AC current system used in a domestic electrical supply?
Alternating current (AC) is easier to transmit over long distances than is direct current (DC).
What type of current is used in your home alternating or direct?
In North America the electrical system is alternating current at a frequency of 60 Hertz. Europe and the UK use alternating current at a frequency of 50 Hertz. Direct current systems are obsolete because of the inability to transmit the voltage over long distances.
What is one way that alternating current is more useful than direct current-?
alternating current is easier to transfer long distances
Who believed it was dangerous to fool around with alternating currents?
Thomas Edison believed it was dangerous to fool around with alternating currents and promoted the use of direct current instead. He was in a bitter rivalry with Nikola Tesla, who championed the use of alternating current for its efficiency over long distances.
What is one way that alternating current is more useful than dirrect current?
One way that alternating current is more useful than direct current is that it can be easily transformed into different voltage levels using transformers, enabling efficient long-distance power transmission. Additionally, alternating current is capable of powering electric motors, which are essential in many industrial applications and household appliances.
Is a house direct or alternating current?
The current flowing in a normal household lighting electric bulb is AC. DC systems are just a fraction of 1% in ordinary household systems.The current flowing in a flashlight bulb is Direct Current (DC) if the flashlight runs on batteries.
Why do transmission lines use alternating current instead of direct current?
Transmission lines use alternating current (AC) instead of direct current (DC) because AC can travel long distances with less energy loss. AC can be easily converted to higher or lower voltages using transformers, which is important for efficient power distribution. Additionally, AC allows for easier control and regulation of power flow in the grid.
What kind of current did Westinghouse advocate?
Westinghouse advocated for alternating current (AC) as opposed to direct current (DC). He believed that AC was more efficient for transmitting electricity over long distances and ultimately won the “War of Currents” against Thomas Edison, who supported DC.
What did alternating electrical current effect in the 1920?
The widespread adoption of alternating current in the 1920s revolutionized the electrical power industry by allowing for the efficient transmission of electricity over long distances through high voltage power lines. This enabled the development of large-scale power grids that could supply electricity to homes, businesses, and industries, leading to improved standards of living and economic growth.
