What is the relationship between current and voltage in ac circuit?
The current and voltage in an RLC circuit are related by V = IZ. The phase relationship between the current and voltage can be found from the vector diagram: its the angle between the impedance, Z, and the resistance, R. The angle can be found from: If the angle is positive, the voltage leads the current by that angle.
What is the energy source of ac?
Alternating current (ac) is the flow of electric charge that periodically reverses direction. An ac is produced by an alternating emf, which is generated in a power plant, as described in Induced Electric Fields. If the ac source varies periodically, particularly sinusoidally, the circuit is known as an ac circuit.
How is energy transferred in ac?
Energy isn’t carried from source to load via electrons. Energy doesn’t even flow down the wires. Instead, electrical energy travels from the electrical source to the electrical load via an electromagnetic (EM) field in the space surrounding the source, wires, and load.
How do you calculate current from ac and voltage?
The voltage source of an ac system puts out a voltage that is calculated from the time, the peak voltage, and the angular frequency. In a simple circuit, the current is found by dividing the voltage by the resistance.
What is the relationship of voltage and current?
The relationship between voltage, current, and resistance is described by Ohm’s law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r.
How are power voltage and current related?
In other words, Energy = power x time and Power = voltage x current. Therefore electrical power is related to energy and the unit given for electrical energy is the watt-seconds or joules. Electrical power can also be defined as the rate of by which energy is transferred.
How is AC voltage created?
AC voltage is made possible thanks to Faraday’s Law of Induction. The law specifies how electric currents can be induced in a moving coil as it cuts through magnetic flux at the right angle. The current starts to flow in the opposite direction as the loop starts cutting the magnetic flux but in an opposite direction.
Which sources produce AC current?
Textbook solution. Hydroelectric power plants and AC generators are some of the sources that produce alternating current. Thermal power generators,nuclear power generators also produce AC. Hydroelectric power plants and AC generators produce AC.
How is energy transferred into electricity?
Energy transfer takes place when energy moves from one place to another. When energy in a battery is used to power an electronic device, chemical energy is transformed into electrical energy, which moves along wires. Three more ways energy can be transferred are through light, sound, and heat.
What is the frequency of AC current?
The most common frequency of alternating current is 60 cycles per second (usually termed 60 cycles) or more commonly, 60 Hertz (Hz).