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Is the resistance lower when the areas are wet?
Yes, the resistance can be lower when the areas are wet due to the presence of water providing a conductive path for electric current to flow more easily. In wet conditions, water can reduce the insulating properties of surfaces, leading to a decrease in resistance. However, wet conditions can also increase the risk of short circuits and electrical hazards.
Does the resistance of a wire depend on the cross section area of the wire?
No, the resistance of a wire primarily depends on its length, resistivity, and temperature. The cross-sectional area of the wire influences the wire's resistance indirectly by affecting the wire's overall resistance. A larger cross-sectional area generally results in lower resistance due to increased conducting area for current flow.
How can you reduce the resistance in a wire?
You can reduce the resistance in a wire by increasing the cross-sectional area of the wire, using a material with lower resistivity, or shortening the length of the wire. These methods can help to lower the resistance and improve the flow of electric current.
How does the resistance of a wire depend on its dimensions?
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. This means that for a given material, a longer wire will have higher resistance and a thicker wire will have lower resistance. The relationship is described by the formula: Resistance = resistivity x (length / cross-sectional area).
What has a lower resistance a long thin iron wire at high temp or a short thick copper wire at low temp?
A short thick copper wire at low temperature would have lower resistance compared to a long thin iron wire at high temperature. This is because resistance is inversely proportional to cross-sectional area and directly proportional to temperature and length of the wire. The short thick copper wire has a larger cross-sectional area, which results in lower resistance.
How will read the humsn body resistance?
The resistance of a human body changes, you can divide it in 3 groups: dry body, semi-wet body (sweat,...) and wet body (in a swimming pool,...) the more wet the body becomes, the lower the resistance.
What is r lower for wet skin than for dry skin?
resistance for electricicty
Is the resistance lower when the areas are wet?
Yes, the resistance can be lower when the areas are wet due to the presence of water providing a conductive path for electric current to flow more easily. In wet conditions, water can reduce the insulating properties of surfaces, leading to a decrease in resistance. However, wet conditions can also increase the risk of short circuits and electrical hazards.
Does the resistance of a wire depend on the cross section area of the wire?
No, the resistance of a wire primarily depends on its length, resistivity, and temperature. The cross-sectional area of the wire influences the wire's resistance indirectly by affecting the wire's overall resistance. A larger cross-sectional area generally results in lower resistance due to increased conducting area for current flow.
Why has the greater electrical resistance in wet skin?
Wet things are provide less resistance to electricity
How can you reduce the resistance in a wire?
You can reduce the resistance in a wire by increasing the cross-sectional area of the wire, using a material with lower resistivity, or shortening the length of the wire. These methods can help to lower the resistance and improve the flow of electric current.
How does the resistance of a wire depend on its dimensions?
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. This means that for a given material, a longer wire will have higher resistance and a thicker wire will have lower resistance. The relationship is described by the formula: Resistance = resistivity x (length / cross-sectional area).
What type of wire increases when it is made thinner?
Since resistance is inversely-proportional to cross sectional area, the lower the cross-sectional area, the higher the resistance. So ALL types of wire exhibit this behaviour!
What has a lower resistance a long thin iron wire at high temp or a short thick copper wire at low temp?
A short thick copper wire at low temperature would have lower resistance compared to a long thin iron wire at high temperature. This is because resistance is inversely proportional to cross-sectional area and directly proportional to temperature and length of the wire. The short thick copper wire has a larger cross-sectional area, which results in lower resistance.
Is higher specific resistance more conductive?
No, higher specific resistance means lower conductivity. Specific resistance is the resistance of a material per unit length and cross-sectional area, so a higher value indicates that the material resists the flow of electric current more effectively. Conversely, materials with lower specific resistance values are more conductive.
The lower the value of the coefficient of friction. the blank the resistance to sliding?
The lower the value of the coefficient of friction, the lower the resistance to sliding.
What about the power loss if the area of the conductor size is doubled?
If the area of the conductor is doubled, the resistance of the conductor decreases, since resistance is inversely proportional to the cross-sectional area. This reduction in resistance leads to lower power loss, as power loss in a conductor is given by the formula ( P = I^2 R ), where ( P ) is power loss, ( I ) is the current, and ( R ) is resistance. Therefore, with a smaller resistance from the increased area, the power loss will be significantly reduced for the same current.
