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16y ago

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Why high voltage does not kill?

Its not voltage that kills it is current.High voltage CAN kill, if it can also provide high current (especially if the current comes near the heart as it takes under 1mA to stop the heart which isn't much current).However if the high voltage source is current limited and/or the current only passes through the extremities it is very unlikely to kill.


What is cutoff voltage in diodes?

If you're looking for a definition, it's: the voltage at which, a diode can be considered a "short circuit" or low-value resistor It varies with each diode, but most have approximately 0.6 or 0.7 Volts across them when you get almost 1mA flowing FORWARD through them. For light emitting diodes (LEDs), it varies between diodes and is largely dependent on the colour of the light. Green ones typically have 1.3V @ 1mA, red = 1.8V @ 1mA, and higher for other colours. Infrared LEDs usually have 1.1V @ 1mA. Higher cutoff voltages occur at higher forward currents, meaning that at 1mA, Vf might be 1.8V for a certain diode, but at 10mA Vf is maybe 1.9V. One important side note is that reverse current is still possible, but is so small it's usually negligible. Also, it's not recommended to force current backwards through a diode (exception: Zener diodes) because it usually requires a higher voltage to accomplish this. The cutoff voltage of a diode is the maximum voltage that the diode can withstand in the revers biase above which the device will be destroyed.


How many is 1mA?

100


Does automatic voltage regulators consume energy?

Yes. Almost every electronic device consumes energy, however small. However the power draw of a voltage regulator is extremely tiny, typically less than 1mA. As such, they usually save more power than they consume.


How much current can be tolerated by a human body?

It varies depending on where in the body the current is passing through. Less than .1mA, if it's across the heart.


Show 1mA in decimal form?

1 mA is equal to 0.001 A.


How does a Digital Multi-Meter or DMM measure resistance?

A DMM measures resistance by passing a known current through the object you are measuring and reads the voltage. You can then calculate the resistance using the equation V=I*R. R=V/I So for 1mA and a return voltage of 1V the resistance must = 1 KOhm. R= 1/0.001 = 1000 Ohm


How many A is 400 mA?

mA stands for milliAmpere. milli- means 1/1000th.So 1mA = 0.001 A400 mA = 0.400 A


How many watts is 500ma?

A half of an amp equals 500 mA.ma or mA means milliAmp or milliAmpere. As milliAmpere and Ampere are related as: 1mA = 1*10^-3 A = 0.001 A, so you can express 500 ma as 500*0.001 A = 0.5 A. See relarted linksbelow.


How you differentiate amplifier and transformer?

A big difference. A transformer converts power into more useful means of transportation or matching to the end results.Pincoming = IPVP = Poutgoing = ISVS.giving the ideal transformer equationVs/VP= Ns/NP=IP/Isthen as the outgoing voltage of the transformer increase, the outgoing current will decrease. An amplifier adds power. For example, voltage amplifier add voltage (amplify) independent the amplifier current.


An analog multi meter is quoted as having an accuracy of 1 k ohms and volt if it is set for FSD of 100v what is its loading resistance?

I think you mean the meter is rated at 1K ohms per volt. It means that with a series resistance designed to give FSD at any required voltage, the total series resistance must be 1000 ohms per volt (100K ohms for 100volts) . This is because 1K ohms per volt is just another way of saying that the full scale reading occurs at 1mA current. In that case a full scale deflection for 100 volts applied, 1mA is obtained with a total resistance (meter + added resistance) of 100 kOhms which is your loading resistance.


Why you use current transformer and rogowski coil both?

if you want to measure a wide range of current, example 1mA to 200A (if the device is intended for the metering and protection), normally CT and rocoil is used together, it is difficult to make rocoil sensitive in range of 1mA, but you can do the task with the CT, but the same CT gets saturated above 5A, in that case rocoil start measuring, since rocoil is air core it wont saturate.