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The transformer is a very efficient means of stepping up or down from the supply voltage whilst having the opposite and proportional effect on current.
When power suppliers want to supply power over large distances, they step up the voltage to around 132,000 volts and suspend the wires at a safe distance from the ground. This is because heat loss is proportional to the current squared. Thus high power supply with minimal energy loss.
When the supply has reached a local area the voltage is stepped down in stages along with a split of the phases according to the need.
The household supply of 230-240v is still too high for areas where safety is an issue like outdoor site work and is stepped down further to around 110v.
Individual appliances, especially ones with sensitive components will have their own Transformers, often used in conjunction with a rectifier, to give a steady DC low voltage from the original higher AC supply.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoIn order to generate the microwaves used to excite water molecules in food (and hence, heat it up), a high voltage at high current is required. The transformer changes the mains voltage (230V or 120V) to around 3-5kV. These are needed to propel electrons within the magnetron (the microwave generator).
WARNING: the microwave oven is probably THE most dangerous device to work with! Its power source/transformer stands ready to deliver several kilovolts at several amperes at any time! Use EXTREME caution when dealing with these devices.
Also, microwave radiation excites water molecules. The human body is around 55-75% water, and therefore very susceptible to this kind of radiation. The screens and isolators within the oven are there for a reason - this radiation is lethal to living things.
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What is the correct cable size for the 550 KVAR capacitor bank?
Cable sizing is based on amperage of the load. The rating of the capacitor bank and the voltage at which it operated need to be stated to give an answer.
What is dc link capacitor?
when the DC current flows through the capacitor .the leakage of the charges is in capacitor called Dc leakage capacitor .
What is need of capacitor and resistor in circuit?
because without using capacitor or resistor in a circuit,it cant be complete.Resistor is used to protect the circuit by giving a certain amount of voltage.Capacitor is used to charge and discharge purpose.
What is the differencebetween a run capacitor and start capacitor?
The run capacitor is used when the load is functional while the start capacitor is used to produce the initial torque to drive the load.
How a trimmer capacitor use?
A trimmer capacitor is a semi-adjustable capacitor placed across a variable tuning capacitor and pre-set to allow the main capacitor to track correctly with another variable capacitor on the same shaft. The adjustment takes out any differences introduced by the connected circuit.
What does a capacitor in a microwave oven do?
The capacitor in a microwave oven, along with its associated high voltage diode, form what is called a voltage doubler to drive the magnetron.
What is wrong with a microwave if it works for a few seconds and then stops?
There's really only four major components in a microwave oven. A transformer, a capacitor, a diode and the magnetron tube itself. If it heats while it's running for the few seconds, I'd think that the capacitor needs to be changed.
Can you use a 25K capacitor instead of a 2.2K capacitor?
In general, no. You need to use the correct capacitor as designed for the circuit.
Can you by-pass a capacitor in an electric motor?
You can not by-pass the capacitor in an electric motor. Most are capacitor-start motors which require the capacitor to be operational in order to start. If the capacitor is not working then it will need to be replaced.
Why does microwave oven shock when off?
A microwave oven should not shock when it is turned off. If you are experiencing electric shocks when touching the microwave oven, it could be due to a faulty electrical connection or a grounding issue. It is recommended to consult a professional electrician to inspect and fix the problem.
How do you know you need a new microwave?
If the microwave stops heating or the turntable stops working, then you need a new one.
What capacitor value is good for car battery?
A car battery does not need a capacitor as it's regulating capacity (when in good condition) is well above any capacitor you can fit into your car.
Can you microwave a Sainsbury?
You would need a VERY large microwave oven to do so.
What size capacitor you need for a 1000 watts amplifier?
It takes 1 farad for every 1000 watts so u need 2 farads.
What size Capacitor is need for copeland cr38k6pfv875?
35mfd/440V
Regarding Capacitors- can any general capacitor work on a circuit diagram that shows a polarized capacitor or do you need a special capacitor for polarization?
A Polarized capacitor means that the capacitor is polarity sensitive. if you were to connect the capacitor incorrectly the capacitor would blow up. A capacitor that is marked as being polarity sensitive will have the negative lead labeled usually with a white strip. These capacitors can only be used in conjunction with a dc source. Always consult a professional when installing electrical equipment.
What happens to the charge if you double the voltage across a capacitor?
In order to double the voltage across a capacitor, you need to stuff twice as much charge into it.
