An ammeter is used to measure the current through a circuit and thus it must be in series with that load. Also, it's resistance is so low that it cannot be connected in parallel since it will result in a short circuit.
A Voltmeter is intended to measure the voltage across a circuit and thus it must be connected in parallel. It has a very high resistance such that connecting it in series with a circuit will lender the circuit useless or inoperative.
-- A voltmeter measures the potential difference between two points.
So the meter must connect to the two points, but it must not change
or disturb anything that's going on betweem them electrically.
-- An ammeter directly measures the current flowing through a conductor.
The only way to directly measure current (at least DC) is to make the current
flow through the meter.
The ammeter is used in series, because you want to measure the current through a circuit. The voltmeter is used in parallel, because you want to measure the voltage across a circuit. If you were to place the voltmeter in series, no current would flow because of the relatively high impedance of the voltmeter. If you were to place the ammeter in parallel, you would create a short-circuit, due to the relatively low impedance of the ammeter.
The numerical representation of one coulomb of charge moving past a point in a circuit per second is called an ampere.
14
The ampere frame rating for a circuit breaker designates how the circuit breaker should be configured. It also states the trip unit of the amp.
The term 'burden' is used to describe the secondary load applied to an instrument transformer; the reason for this is so that it is not confused with the 'load' supplied by the high-voltage circuit to which the transformer's primary is connected. A burden is either a measuring instruments (ammeter,voltmeter, wattmeter, etc.) or protective relay, depending on the function of the instrument transformer. 'V.A' is the symbol for 'volt ampere', which defines the 'power' rating of the instrument transformer.
The ammeter is used in series, because you want to measure the current through a circuit. The voltmeter is used in parallel, because you want to measure the voltage across a circuit. If you were to place the voltmeter in series, no current would flow because of the relatively high impedance of the voltmeter. If you were to place the ammeter in parallel, you would create a short-circuit, due to the relatively low impedance of the ammeter.
1 volt
The numerical representation of one coulomb of charge moving past a point in a circuit per second is called an ampere.
14
I = E/R = 12/1,000 = 0.012 ampere = 12 milliamperes.
The ampere frame rating for a circuit breaker designates how the circuit breaker should be configured. It also states the trip unit of the amp.
The current (ampere) changes from a high value at switch on to a run current of of approx 0.5 amperes. The fuse blows at switch on if too many lamps are connected. It also depends on the cable used to wire up the lamps and the length of the cable.
Given R=? I=12 ampere V=120 Volts equation I=V divided R Solution; R=12 ampere 120 Volts answer (10)
An "ampere" is a measure of the current in an electrical circuit.
Power = voltage x currentCurrent = power/voltage = 12/120 = 0.1 ampere = 100 milliamperes
16 outlets or 80% of the total Amperage of the circuit.
The term 'burden' is used to describe the secondary load applied to an instrument transformer; the reason for this is so that it is not confused with the 'load' supplied by the high-voltage circuit to which the transformer's primary is connected. A burden is either a measuring instruments (ammeter,voltmeter, wattmeter, etc.) or protective relay, depending on the function of the instrument transformer. 'V.A' is the symbol for 'volt ampere', which defines the 'power' rating of the instrument transformer.