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What is the difference between AC and DC voltages?
Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of a constant-voltage circuit. Most well-known applications, however, use a time-varying voltage source. Alternating current (AC) is the flow of electric charge that periodically reverses direction.
What is the formula of DC voltage?
P=VXI. P = V X I . Here P is power in watts. V is voltage in volts.
What does AC and DC voltage mean?
Alternating Current (AC) is a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles. Direct current (DC) is electrical current which flows consistently in one direction.
What is the main principle of DC voltage?
DC motor changes the electrical power into mechanical energy. DC generators produce electrical power based on the principle of faraday’s law of electromagnetic induction. Based on this law, when a conductor moves in a magnetic field, the magnetic lines of force are cut.
What does DC mean in voltage?
The term DC is used to refer to power systems that use only one polarity of voltage or current, and to refer to the constant, zero-frequency, or slowly varying local mean value of a voltage or current. For example, the voltage across a DC voltage source is constant as is the current through a DC current source.
What is the function of DC voltage?
The DC is usually used in low-voltage applications such as battery operated equipment. When a DC is required, and the use of battery is uneconomical or requires constant charging, a power supply is used to convert the ac to dc . This will charge the battery, and the equipment used off the mains until the battery is depleted (i.e. a mobile phone).
Why use DC voltage?
DC is used if your power source is a battery, like in a car, a boat or a house off the power grid. AC is practical if you want to transform your voltage up or down like for transport of current through high tension wires.
What is average DC voltage?
The average voltage equation for a half wave rectifier is V DC = V m /π . In a full wave rectifier, the negative polarity of the wave will be converted to positive polarity. So the average value can be found by taking the average of one positive half cycle. Average voltage equation for a full wave rectifier is V DC = 2V m /π .