what is the difference between ac and dc frequency?
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DC has no frequency of zero frequency. In AC the flow of current changes its direction backwards periodically. It flows in a single direction steadily. Electrons only move in one direction – that is forward.
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In a direct current (DC) circuit, current flows in one direction only, and one pole is always negative and the other pole is always positive. In an alternating current (AC) circuit the two poles alternate between negative and positive and the direction of the current (electron flow) reverses periodically.
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DC is more efficient than AC power and has lower line losses than AC lines. With AC, the current travels on the skin of the conductor while with DC, the current flows throughout the entire conductor and not just the conductor skin. ... Though both, C and DC transmission lines will still have resistive losses.
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Voltage is pressure or a force that can drive a flow of electrons given the chance. ... Hertz is a measure of frequency. It is used in AC to show the rate of change. It was measured in Cycles per second but now is in Hertz but they are both the same.
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The basic difference between the two can be understood from their names, DC generator gives Direct Current(DC) and Synchronous Generator gives Alternating Current(AC).
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Write one difference between A.C and D.C. (i) Graph A represents direct current (D.C). ... The magnitude of direct current is constant and flows in one direction only. The magnitude of AC changes with time and direction of alternating current reverses periodically.
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Alternating current is cheaper to generate and has fewer energy losses than direct current when transmitting electricity over long distances. Although for very long distances (more than 1000 km), direct current can often be better.
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One of the key differences between an AC and DC generator is that in the former, the electrical current reverses direction occasionally, while in the latter, electric current flows progressively in one direction.
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We need to convert AC to DC because of below facts: AC signals can not be stored and DC power or signals can be stored. Thus,to store the electrical energy we need to convert it into DC. ... AC can be transported over long distances because of it's frequency and dc can not be transported as dc has zero frequency.
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Direct Currents actually have zero frequency, as the current is constant. ... In terms of fatalities, both kill but more milliamps are required of DC current than AC current at the same voltage. If the current takes the path from hand to hand thus passing through the heart it can result in fibrillation of the heart.
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However, the process they use is different. An AC generator creates an alternating current that periodically reverses direction. But in a DC generator, a direct current flows in one direction. In an AC generator, the coil through which current flows is fixed and the magnet usually moves.
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DC (Alternating Current vs. The difference between AC and DC lies in the direction in which the electrons flow. ... In DC, the electrons flow steadily in a single direction, or "forward." In AC, electrons keep switching directions, sometimes going "forward" and then going "backward."
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Why, Alternating Current and Direct Current, of course! Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.
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Alternating current, AC is generally used for power distribution, which is why the mains sockets in our homes and at work provide an alternating current to power whatever is needed, but direct current, DC is more widely used for the electronics boards themselves and for many other applications.
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An AC generator creates an alternating current that periodically reverses direction. But in a DC generator, a direct current flows in one direction. In an AC generator, the coil through which current flows is fixed and the magnet usually moves.
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Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction. Most students of electrical engineering and related subjects begin their studies by learning about direct current (DC).
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There are a number of differences between AC and DC solenoids. DC solenoids are quieter and function more slowly than AC solenoids. They are also less powerful than AC solenoids. AC solenoids can run the risk of burning out if they malfunction and remain stuck in the open (full-current) position for too long.