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Why is DC is not use in home?
because in dc current is direct current and it continously varies. so it may be possible that some instrument may be damaged. so to avoid this first we have to convert dc to ac. Actually in our home dc is provided.suppose you want to charge your mobile than you have to convert first dc current to ac current.AnswerAll homes are supplied with AC voltage. The reason for this is that the magnitude of an AC voltage is easily changed using a transformer, and it is easily changed into DC using a rectifier. Changing the voltage level of DC is far more complicated, as is changing it to AC.
How you can change a constant DC voltage to a variable DC voltage?
By installing the varialble resistor in the circuit,the constant dc voltage would change .
Why transformer not allow DC supply?
Transformers require changing magnetic flux to operate. DC current provides a steady current, with no changes in magnetic flux that can be picked up by the output coil. Alternating current has continuously changing direction which produces continuous changes in the magnetic flux. This induces changing voltage in the output coil. This is (or was) the huge advantage of AC power systems worldwide: The voltage could be easily changed from high voltage for generation and transmission into low voltage at the consumer. DC generators had to run at the voltage required by the consumer and powerlines could not be higher voltage / lower current than the consumer. Today, switching systems easily convert DC to other DC voltages, DC to AC, etc. This is done in most computers, telephones, stereos, etc. It can even be done on a grand scale, allowing use of high voltage DC power lines in selected places.
What value of voltage measure by DMM Vrms or Dc voltage?
Many can measure both - Vrms (AC) or DC voltage.
What device used to increase or decrease DC voltage?
A DC-to-DC converter is the general term for a device that changes DC voltage at one level to another.
How is an ac voltage from an overhead line is converted to dc voltage in electric trains?
A transformer is used. You know those big blocky things that you plug into the wall for pretty much any electronic device? Those contain a transformer with a winding ratio such that the output voltage is lowered, and usually a rectifier bridge that converts AC into DC.
Why is DC is not use in home?
because in dc current is direct current and it continously varies. so it may be possible that some instrument may be damaged. so to avoid this first we have to convert dc to ac. Actually in our home dc is provided.suppose you want to charge your mobile than you have to convert first dc current to ac current.AnswerAll homes are supplied with AC voltage. The reason for this is that the magnitude of an AC voltage is easily changed using a transformer, and it is easily changed into DC using a rectifier. Changing the voltage level of DC is far more complicated, as is changing it to AC.
How you can change a constant DC voltage to a variable DC voltage?
By installing the varialble resistor in the circuit,the constant dc voltage would change .
How do you convert 23 voltage DC to 230 Voltage AC?
How do you convert 23 voltage DC to 230 Voltage AC?
What is meant by DC-DC luo converter?
luo converter is a new technique adopted for dc to dc voltage lifting(dc voltage boosting)...
Why transformer not allow DC supply?
Transformers require changing magnetic flux to operate. DC current provides a steady current, with no changes in magnetic flux that can be picked up by the output coil. Alternating current has continuously changing direction which produces continuous changes in the magnetic flux. This induces changing voltage in the output coil. This is (or was) the huge advantage of AC power systems worldwide: The voltage could be easily changed from high voltage for generation and transmission into low voltage at the consumer. DC generators had to run at the voltage required by the consumer and powerlines could not be higher voltage / lower current than the consumer. Today, switching systems easily convert DC to other DC voltages, DC to AC, etc. This is done in most computers, telephones, stereos, etc. It can even be done on a grand scale, allowing use of high voltage DC power lines in selected places.
How is DC voltage represented on multimeters?
DC
What is excitation of a DC motor?
DC Voltage
What is commutation in DC machines?
It is the process of conversion of generated ac voltage into the armature of a dc generator to dc voltage at the terminal of the dc generator by use of pair of brushes and commutator. OR It is the process of conversion of given dc voltage at the terminal of the dc motor to ac voltage in the armature windings in a dc motor by use of pair of brushes and commutator.
What value of voltage measure by DMM Vrms or Dc voltage?
Many can measure both - Vrms (AC) or DC voltage.
What voltage is DC?
A voltage DC(direct current voltage) is a uni-direction steady voltage. It is the opposite of an analog/alternative voltage which varies in polarity and direction with time.
Do batteries provide a DC voltage or an AC voltage?
Batteries produce DC because the potential difference is determined by the chemical reaction inside the battery. This voltage is constant.
