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It depends in which application, in motors you want to keep amperage low so that the brushes will last (and not melt) and so the armature coil can maintain temperature (along with the field coil)
Let me know which application you mean! Otherwise, in general, amperage kept low is good so that you can keep wire temperature low and maintain the electronics you're dealing with.
What else can I help you with?
Is the current pass through parallel short resistance?
no.because current always try to flow trough low resistance path.as short circuit has low resistance current pass trough short circuit
What is the importance of the reverse-to-forward resistance ratio of a diode?
to determine the comparison of resistance value of both forward and reverse diode . The more the resistance the lower the current , the lower the resistance the higher the current . When reverse bias , the resistance is high and it acts in open circuit and the reverse current is very small that can be neglected . When forward bias , the resistance is low and it acts as short circuit and the forward current is increasing as the voltage supply is higher .
Why does an ammeter have a low resistance while a voltmeter has high resistance?
I am going to assume that you mean low "resistance" in an open circuit test and are performing this with a multimeter. An ammeter works by place a very small amount of resistance in series with a circuit and then measuring the Voltage drop across the resistance. The Voltage is directly proportional to the current as given in ohms law: E = I x R If you are measuring the resistance through the ammeter it will have a very low resistance and impedance.
Why is the shunt field resistance greater than the series field resistance?
In case of series winding total line current is flow through it.line current is very very high.so,to minimize the drop the winding made as low turns and low gauge.hence the resistance is low.in case of shunt winding high resistance winding is used otherwise short circuit the parallel winding.for that winding is made as heavy turns and heavy gauge.
A dangerous circuit with low resistance and high current?
Another name for a circuit with low resistance and high current is a short circuit. It is dangerous because, if you have sufficient energy in the power source, you can damage components and/or cause fires.
When is the current flowing in a circuit said to be very small?
The current flowing in a circuit is said to be very small when it is in the range of microamperes (10^-6 A) or even lower. This low current can be indicative of high resistance or very low power consumption in the circuit.
How will you describe the graph of resistance against current?
If resistance is high that time the current flow is low. Bcoz current always flow through the low resistance path.
Why the resistance of an ammeter is bery low?
0. An ammeter is placed in series with the circuit in question; if its' internal resistance is high, it will change the current flow, thus making the measurement meaningless. For the same reason an ideal voltage meter will have infinite resistance.
What is an electrical conductor that has very low resistance to current at low temperatures called?
You're thinking of a "superconductor", but the real definition is far more bold.A superconductor isn't a substance that has "very low" resistance at low temperatures.It's one that has NO resistance at very low temperatures. None whatsoever. I mean, literally,you can make a coil of wire out of this stuff, keep it super-cold, pump an electric current into thewire, and connect the ends together, and the current is still flowing around the coil months later !I know it sounds incredible, but that's exactly what they do every day, in CT and MRI machines.
Why short circuit has very low resistancs?
A short circuit is defined: An unintentional connection of low resistance or impedance in a circuit such that excessive and often damaging current flows in it (from Wiktionary.org) Why a short circuit has very low resistance is very simple: because that's how "short circuit" is defined.
Is the current pass through parallel short resistance?
no.because current always try to flow trough low resistance path.as short circuit has low resistance current pass trough short circuit
Why resistance is high during short circuiting?
Resistance of a short circuit is actually very low, ideally it is 0 Ohms. In practice the resistance of a short circuit will be equal to whatever the resistance of the short circuited wires is, which is typically very small. So if you substitute very small resistance value R into Ohm's Law(I = V/R), you will get a very high current flowing. Where V=voltage,I=current.
What happed if ammeter is placed in parallel with the component?
Ammeters have a very low resistance, as to not interfere with the circuit they are measuring current in. As such if you connect a very low resistance in parallel, the component is essentially shorted. A great many ammeter fuses have been blown because of this.
What do all electrical insulators have in common?
All electrical insulators have a high resistance to current flow.
What happens to the resistance of the bulb as the current passing through it increases?
Yes but very slightly,because temperature coefficient of bulb element is very low.
An electrical conductor that has very low resistance to current at low temperatures is called?
You're going for "superconductor", but your appreciation of the phenomenonof superconductivity is fundamentally wrong, and your description is incorrect.A superconductor is not a substance that has very low resistance at low temperature.It's a substance that at sufficiently low temperature loses all resistance, and itsresistance becomes zero. Just plain zero.Once an electric current is circulating in a superconducting loop and the ends of theloop are connected together, the current keeps on circulating without any batteriesor power supply as long as the loop stays cold enough. That can be days, or weeks,or months, during which time the current travels around the entire loop literally millionsof times, without additional input and without loss.
Does a good conductor has a high resistance?
No, a good conductor has a low resistance.
