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What is applied voltage?
Any voltage that is fed into or "applied" to an electrical circuit is referred to as an "applied voltage".
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The lightning phenomena is occurred on transmission lines or sub-stations due to which a negative wave is generated hence definitely destroy the power apparatus. So for impuls…e voltage testing of any power apparatus one must produce a negative impulse.
If all environmental conditions remain constant then the resistance will not change appreciably with applied voltage, but the current will increase. An increase in current wil…l raise the temperature of the conductor which will increase the resistance somewhat.
No, the resistance of a copper conductor does not vary according to applied voltage. It is constant for a given wire size, and only varies with temperature. Of cour…se, current through a conductor causes it to heat, so current, not voltage, indirectly causes a change in resistance.
Open circuit test on a transformer is usually performed to measure the IRON losses.Iron losses are produced due to eddy current and hysteresis losses. In open circuit test, th…e LV side, generaly the secondary winding, is kept open and the HV side, generaly the primary winding is fed with the rated voltage and frequency. The rated voltage is applied in order to setup normal flux in the transformer, which in return further produces the normal iron losses at rated voltage. the wattmeter connected at the primary side will show the power consumed due to iron losses. this calculation further utilized for determing the efficiency of transformer.
24Vdc is the most common, it is still possible to buy 110Vac switching inputs but these are rarely used.
When an alternating voltage is applied to a purely resistive circuit, the resulting current is in phase with the voltage.
That has no effect on the resistance. The current doubles also.
For a series circuit, the applied voltage equals the sum of the voltage drops
Since capacitive reactance is inversely-proportional to the supply frequency, as the frequency is increased, the reactance will decrease.
A change in the applied voltage will result to a corresponding change in the current flow because from Ohms law current is directly proportional to the applied voltage.
To fully charge capacitors in series, you would want to make sure they are all rated for the same voltage, and then apply the sum total of the rated voltage (if they are 25 vo…lt caps, and you have three, then apply 75 volts). It may be worth noting here that this really is an academic exercise, since putting capacitors in series results in lower capacitance. Most often capacitors will be paralleled so a higher capacitance is attained.
Voltage is not intended to be applied to a thermocouple. Heat is, and that will result is a voltage being developed which can be used to measure the heat. Actuall…y what will happen depends on the polarity of the voltage applied to the thermocouple. One polarity will heat the thermocouple, the opposite polarity will cool the thermocouple. This phenomenon can be used to make a tiny refrigeration system needing no refrigerant fluid or moving parts (other than a fan to expel the unwanted heat) called a thermoelectric cooler. A practical thermoelectric cooler is not built with ordinary thermocouples used to measure temperature or generate electricity. Instead it uses large thermocouples having a contact area between the dissimilar metals measured in square inches. Two of these large thermocouples are connected back to back in opposite polarity with a thermal insulator between them. When power is applied, one gets cold while the other gets hot. Thermoelectric coolers are used in microprocessor heatsinks and in small portable refrigerators that are powered from a car's cigarette lighter outlet. In fact most of these small portable electric refrigerators have a switch that reverses power to the thermoelectric cooler, making it a heater instead; thus they can keep food either cold or hot, whichever is appropriate.
A capacitor resists a change in voltage. That is how it works. It had to be charged to apply voltage to it in the first case, so it has to be discharged to change the voltage,… making the voltage smaller. It is no different than if you had increased the voltage; you would go through a new charge cycle.