The rms value of a sine wave current is 0.707 Imax. So the answer to your quesion is 0.707 x 4 = 2.83 A.
It enables an existing transformer to be upgraded to meet an increase in load, without having to remove that transformer and replace it with a 'larger' (expressed in volt amperes) one. It provides an useful way of using up a stock of smaller transformers.
clamp is an electrical device having two jaws which open to allow clamping around an electrical conductor. This allows properties of the electric current in the conductor to be measured, without having to make physical contact with it, or to disconnect it for insertion through the probe.
Tis question is incompleet.1000 va =1 kva.This is the power capacity of transformer. A transformer having 2 currents Primary current and secondary current . for that we required both voltage. Simply we can calculate by a formula Voltage x Current x 0.8(power factor)=1000.
The purpose of a voltmeter is to indicate the potential difference between two points in a circuit.When a voltmeter is connected across a circuit, it shunts the circuit. If the voltmeter has a low resistance,it will draw a substantial amount of current. This action lowers the effective resistance of the circuit andchanges the voltage reading.
I m too having the same problem but unable to get rid off...
0.02 amperes
Using Ohm's law, we can find the current (I) in a circuit where 3 ohms is the resistance (R) and 12 volts is the appllied voltage (V). [(E) means energy]I = V / R = 12 / 3 = 4 amps.Visit this link http://www.csgnetwork.com/ohmslaw2.html for making Ohm's Law calculations.
According to ohms law... V=I * R So from the given values V = 4.3*16 = 68.8 Volts
A CT, or current transformer, has a specified current ratio. The 5 in your question is the current supplied to the metering instrument at full scale. CT's current ratio is always full scale to 5, for instance - 200:5, 3000:5, etc.So, if a CT has a ratio of, say, 1000:5, this means when the conductor being measured is supplying 1000 amperes to the load, the CT will output 5 amperes to the instrumentation. The relationship is linear, so if the current is 500 amperes, the output will be 2.5 amperes, at 200 amperes the output will be 1 ampere, etc.This is done so the instrument can be designed always the same, with a 5 ampere input, no matter what size current is to be measured. Otherwise you would have to order (and manufacture) many different models of meter, one for each current range.The metering must be set, or programmed, with the CT multiplier, so it knows how much current is really flowing when it sees 5 amperes on the input.Similarly, we use PT's or potential transformers to reduce higher system voltages to a range that the instrument can also handle.
Parallel or Series Connections for BatteriesTo increase current [measured in Amperes], you connect batteries in parallel. To increase voltage, you connect batteries in series.
The time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes. See more.
No, it is an adjective. the adverb form is "effectively." (it can mean "in an effective manner" or "having the result of")
A battery is charged by having a DC current flow through it.
The current requirements to be a motorist are having a valid driver's license, not having a suspended license, having car insurance and able to pass a vision test.
ac(Alternating Current ) has the high polarity.
Three resistors having a value of 10 ohms each, when connected in series, have a total effective value of 30 ohms, even if they're wrapped in tissue, stuffed into a box, and stored in the back of your sock drawer. What, if anything, they're connected to makes no difference. If you take the series string of three resistors out of the box and connect it to the terminals of a 300-volts power source, then the string will conduct a current of 10 Amperes. Each resistor will dissipate 1,000 watts and heat rapidly, until the first one either melts or explodes, whereupon the series circuit will open and the flow of current will cease.
Having illustrations would be most effective in introducing something.