0
99.99% silver is the best for no resistance.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Does thickness of a metal affect its electrical resistance?
Metals are conductive, but are not perfect conductors and so they have some electrical resistance. How the resistance of the metal is affected by "thickness" depends on what you mean by thickness. If the electrical current has to flow through a longer piece of metal, then the resistance of the metal to electrical flow would be greater. However, if you take that same length of metal and increase the area of the metal by increasing its "thickness", then the resistance of the metal becomes less.
Does heating a metal wire increase or decrease its electrical resistance?
it so increases it
What do you expect of ohmic resistance as you increase or reduce temperature?
It depends. In general, pure metal conductors increase in resistance as their temperature increases; some alloys (e.g. constantan) are manufactured to maintain an approximately-constant resistance for changes in temperature. Materials such as carbon (and most insulators) exhibit a fall in resistance as their temperatures increase.
Why TCR is negative for semiconductor and positive for metal?
Resistance decreases as more carriers are thermally generated with increased temperatures in a semiconductor. In metals there are plenty of carriers so the increase is negligible compared to the increased scattering off the lattice and impurities as temperature increases and therefore resistance increases with temperature.
What is the purpose of resistance box?
it is used for prevention of over flow of current and for maintaining irrespective regulationAnswerA resistance box is a piece of laboratory equipment consisting of an electrically-insulated box, containing a number of resistors which can be connected, externally, via a pair of terminals. The resistance can be adjusted in fixed amounts by inserting or removing metal pegs into a slotted bar; this arrangement either adds or removes the fixed resistors into the circuit.
What is the resistance of metal wire?
the resistance is depends on the type of the metal and ith length
Does thickness of a metal affect its electrical resistance?
Metals are conductive, but are not perfect conductors and so they have some electrical resistance. How the resistance of the metal is affected by "thickness" depends on what you mean by thickness. If the electrical current has to flow through a longer piece of metal, then the resistance of the metal to electrical flow would be greater. However, if you take that same length of metal and increase the area of the metal by increasing its "thickness", then the resistance of the metal becomes less.
Do alloys produce heat resistance?
Alloys can add heat resistance to a metal
Why human body has more resistance than metal?
Human body has more resistance than metal because it has less conductor for carrying electrons.
How does resistance of metal vary with temperature?
The resistance of metals rises with increasing temperature. The resistance semiconducting materials falls with increasing temperature.
Why does silver have less resistance?
It doesn't have that much metal.
What happens to the resistance of a metal when it is heated?
its resistence considerably decreases
Does a metal is high melting point but low resistance?
tndfthgvdudusry
Characteristics of copper?
Corrosion resistance and electrical conductivity. and its metal
Electroplating is the main use of this metal which has a high resistance to oxidation?
Chromium is widely used for electroplating. Chromium is a hard brittle metal that polishes well, has high resistance to heat and is highly resistant to tarnish.
What happens to the resistance of metals as they get hot?
The electrical resistance in a common piece of metal such as copper wire would increase. This happens because as temperature increases the atoms of the metal vibrate quicker and to a larger extent resulting in a greater number of collisions for electrons moving along the metal.
If the temperature of a metal conductor increases the electrical resistance of the conductor usually?
increases
