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For many years, mainland Western Europe has used a mains electricity supply rated at nominally 220VAC @ 50Hz, while the UK used 240VAC @ 50Hz. Currently, ALL Western European supplies are classified 230VAC and most other countries follow this. However the US and Canada use 120 V @ 60 Hz.
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What equation relates power to current and resistance?
Power = (current) times (voltage)Current = (Power) divided by (voltage)Voltage = (Power) divided by (current)
What is the relationship between voltage power and current?
The unit of power is watts, the unit of current is amps, and the unit of voltage it volts. Power = Voltage X Current Voltage = Power / Current Current = Power / Voltage In electricity, power is symbolized with a P, current with an I, and voltage with a V. The real formula looks like: P = V x I V = P / I I = P / V
What is the kva for 138kv?
KVA is a measurement of power; kV is a measurement of voltage. You're asking "What is the power for voltage?", which makes no sense. Power = Voltage times current.
What is the main different between the power transformer and voltage transformer?
Voltage Tarnsformer transforms only voltage. While power transformer transforms both voltage and current.
Can you calculate power by multiplying voltage and current?
Not enough information. Power = current x voltage. Since voltage can be anything, there is no way to calculate power. Time is irrelevant; though once you have the power, it can help you calculate energy (energy = power x time).
What is a device that changes electric current into a different voltage?
Nothing can change electric current to voltage. You can compare "current " to rate of flow, while "voltage" is the energy level. Transformers can be used to increase or decrease the voltages of alternating current as is done from 'street power' to domestic power.
Why is it electrical power is normally transmitted at high voltage?
Simplistically Power is Voltage times Current. Sending at domestic voltage requires much more current to be sent for the same power and therefore much thicker wires, heavier equipment and more repeater transformers as over distance the resistance of the wires and switches would cause the voltage to fall quickly below domestic. For the same power delivery, sending at higher voltages requires less current, lighter wires, and voltage losses over distance are more easily managed so much less equipment is required.
Domestic installation power circuit in small building diagrams?
There is no standard diagram for a small domestic building power circuit. The power needs of the building will determine the size of the breaker box and voltage needed. Local electrical codes will also change the way that the building is wired.
What is the three phase voltage in Pakistan?
Pakistan has a 220 v 50 Hz domestic supply and the three-phase voltage is sqrt(3) times higher, or 381 v. Higher voltage are also used for three-phase power transmission.
How do power stations deliver electricity to us?
Through power lines which operate at high voltage over long distances, this is then stepped down to domestic level, either 120 or 240 volts
What equation relates power to current and resistance?
Power = (current) times (voltage)Current = (Power) divided by (voltage)Voltage = (Power) divided by (current)
How does a capacitor work in various industrial and domestic appliances and examples of capacitor in use?
Capacitor is connected parallel to the line which serves as power factor correction, increase line efficiency, voltage stability and reduced line losses and voltage drop.
What Is necessary to convert higher voltage power to low voltage power?
A transformer
How choose voltage according to power?
how to choose rate of voltage according to power
What is the formula for power delivered by a voltage source?
Power is voltage times current.
What is the relationship between voltage power and current?
The unit of power is watts, the unit of current is amps, and the unit of voltage it volts. Power = Voltage X Current Voltage = Power / Current Current = Power / Voltage In electricity, power is symbolized with a P, current with an I, and voltage with a V. The real formula looks like: P = V x I V = P / I I = P / V
Why in India you use 220 volt in domestic circuits?
India followed British standards and moreover 220V is more economical and will have less transmission power losses. Power loss= square of Current multiplied by resistance of the conductor. Those countries where cost of power generation is high they can go for 220 Volt domestic voltage and compromise little bit on safety. Countries where cost of production is less they can afford to have 110V for domestic as power losses even out to cost of production.
