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Current (measured by an ammeter)
and
Voltage (measured by a voltmeter)
R= V/I
Resistance equals voltage divided by current
================================
That's wonderful, but the measurement doesn't "affect" the resistance
of the wire.
The factors that do "affect" the resistance ... i.e. determine what the
resistance will be ... are
-- substance of which the wire is composed
-- dimensions of the wire: thickness and length.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoThere are three main factors in wire resistance:
The length
The diameter
And the material being used to make the wire
R = p (L / A)
The resistance is proportional to the length of the wire divided by its cross-sectional area. p is the resistivity of the material in question and varies greatly. Since area (assuming a circular wire) is A = pi * r2 the larger the diameter of the wire the lower its resistance will be.
Wiki User
∙ 12y agoTwo factors that affect the resistance of wire are, the length of the conductor and the circular mill area of the conductor. The third factor is the metallic element from which the conductor is made.
Wiki User
∙ 9y agoMainly the material and cross-section area. To a smaller degree the frequency and the cross-section area vs circumference ratio. A multi-strand wire will have a slightly lower resistance to high frequency than a single strand wire of the same area.
Wiki User
∙ 11y agoits elemental make up,its diameter and length
Wiki User
∙ 6y agoLength, area, material and temperature affect resistance.
Wiki User
∙ 13y agoIncrease in length. Increase in temperature. Decrease in cross sectional area.
Wiki User
∙ 6y agoSome factors that can affect the resistance are:* Length of the wire
* Cross-section of the wire
* The material from which the wire is made
* The temperature
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How does temperature affect resistance of a wire?
If you are asking if a hot wire has a greater resistance than a cold wire then the answer I would say is yes. Cold wires have always had less resistance than hot wires
Would thick wires tend to have the least amount of eletrical resistance?
Yes, the resistance is directly proportional to length of wire and inversely proportional Area, hence when Length of wire increases the resistance also increases and when Area increases the resistance decreases. This means a thick wire has least amount of Electrical resistance.
What property of a wire increases when it is made thinner?
It's resistance to electric current increases.
A piece of wire is stretched such that its length increases and its radius decreases the resistance of the wire will tend to?
A piece of wire stretched such that its length increases and its radius decreases will tend to have its resistance increase. The formula for this is: R = ρL/A where ρ = resistivity of the material composing the wire, L = length of the wire, and A = area of the conducting cross section of the wire. It can easily be seen that as area decreases resistance gets higher. In the case proposed the wire length is not reduced as it is stretched to reduce the area, this increases the resistivity as well.
Stretch a copper wire so that its thinner and the resistance between its end?
increases
How does the resistance of a wire vary with its length?
resistance of wire increases with increases of length
How does temperature affect resistance of a wire?
If you are asking if a hot wire has a greater resistance than a cold wire then the answer I would say is yes. Cold wires have always had less resistance than hot wires
How is a current affected across a wire if its resistance increases?
As the resistance increases the temperature will also increases....
Would thick wires tend to have the least amount of eletrical resistance?
Yes, the resistance is directly proportional to length of wire and inversely proportional Area, hence when Length of wire increases the resistance also increases and when Area increases the resistance decreases. This means a thick wire has least amount of Electrical resistance.
What property of wire increases when it is made thinner?
resistance
Explain how the resistance of a wire varies with its length?
The resistance of a wire is a measure of how difficult it is for electricity to flow through the wire. The resistance of a wire is inversely proportional to its cross-sectional area and directly proportional to its length. This means that, all else being equal, the resistance of a wire increases as its length increases. There are several factors that can affect the resistance of a wire, including the type of material the wire is made of, the wire's cross-sectional area, and the wire's temperature. The resistivity of the material the wire is made of is a measure of how easily electricity can flow through the material, and different materials have different resistivities. For example, copper has a lower resistivity than aluminum, so a copper wire will have less resistance than an aluminum wire of the same size and length. In general, the resistance of a wire increases as its length increases because the electrons flowing through the wire encounter more and more obstacles as they travel through the wire. The longer the wire, the more obstacles the electrons must overcome, which increases the resistance of the wire. It is also important to note that the resistance of a wire is not a constant value, and it can change depending on the temperature of the wire. As the temperature of a wire increases, the resistance of the wire also increases. This is because the higher temperature causes the atoms in the wire to vibrate more, which makes it more difficult for the electrons to flow through the wire.
What property of a wire increases when is made thinner?
It's resistance to electric current increases.
What else increases as energy carried by a current increases?
The amount of electric energy that is converted into thermal energy increases as the resistance of wire increases. As the resistance in the current increases, the current in the circuit decreases.
What property of a wire increases when it is made thinner?
It's resistance to electric current increases.
What property wire increases when it is made thinner?
electrical resistance
What happens to the resistance of a wire as it's length increases?
Other things being equal, a greater length will result in more resistance.
What happens to the current in a filament is replaced by a longer wire?
resistance increases
