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What are examples of devices that use direct current?
Cell phones, Flat-screen TVs (AC goes into the TV, which is converted to DC) Flashlights. Hybrid and electric vehicles., remote controle, etc.
How do you convert AC to DC voltage?
to use one or more diodes, those handy electronic components that allow current current to pass in one direction
How do you find the RMS value of AC voltage?
The RMS value is the square root of the mean (average) value of the squared function of the instantaneous values
What is the voltage drop across a diode?
about 0.6 to 0.7 volts
What type of rectifier uses four diodes to convert the AC to DC?
What type of rectifier uses four diodes to convert the AC to DC?
what material is the diode made of?
most diodes are made of silicon, but other semiconducting materials such as gallium arsenide and germanium are also used.
What is main function of diode?
A characteristic of diodes is that current flows (forward direction) or current does not flow (reverse direction) depending on the direction of applied voltage.
What is a Transformer?
It is commonly used to increase or decrease the supply voltage without a change in the frequency of AC between circuits.
what is the principal difference between a step-up transformer and a step-down transformer?
A transformer that increases the voltage from primary to secondary is called a step-up transformer,the opposite is called a step-down transformer.
What is the Working Principle of a Transformer?
The transformer works on basic principles of electromagnetic induction and mutual induction.
what are the main parts of a transformer?
an iron core,primary winding and secondary winding or coil of wire.
What is the purpose of core in transformer?
The role of the magnetic core in transformers is often stated as being to increase and concentrate the magnetic flux that links the primary and secondary coils.
What is Eddy Current How are they reduced?
generated in the iron core due to changing magnetic flux, reduced by using thin sheets of magnetic material (laminations)
What is the unit of measurement of magnetic flux?
The SI unit of magnetic flux is the weber (Wb; in derived units, volt–seconds),
