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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
Is aliminuim a metal?
Yes, aluminum is a metal. It is a lightweight, silver-colored metal that is known for its strength and resistance to corrosion.
Is tantalum a metal non metal or a metalloid?
Tantalum is a metal. It is a transition metal known for its high melting point and corrosion resistance.
Why does silver have less resistance?
It doesn't have that much metal.
Does increasing the diameter of a metal wire decrease the electrical resistance?
Increasing the diameter of a metal wire typically decreases the electrical resistance. This is because a larger diameter provides more space for electrons to flow through, resulting in lower resistance.
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?
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Is titanium a metal or a metalloid?
metal
What is a silver white metal that does not tarnish?
Silver is a silver-white metal that does not tarnish easily due to its resistance to corrosion.
Does a short thick metal wire or a long narrow metal wire have more resistance?
A long narrow metal wire would have more resistance compared to a short thick metal wire. Resistance is directly proportional to the length of the wire and inversely proportional to the cross-sectional area, so a longer wire with a smaller cross-sectional area will have higher resistance.
