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What happens to insulation resistance when decreasing cable length?
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∙ 11y ago
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∙ 11y ago
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What is LV cable insulation resistance acceptance value?
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
What happens to the resistance as the area increases?
Double the area means half the resistance. Resistance = resistivity times length / area. Resistivity is a property of the material only.
What happens to the current of the wire when the length increases?
resistance is directly proportional to wire length and inversely proportional to wire cross-sectional area. In other words, If the wire length is doubled, the resistance is doubled too. If the wire diameter is doubled, the resistance will reduce to 1/4 of the original resistance.
What three primary factors influence electrical resistance of circuit?
The resistance of any material is affected by its length, cross-sectional area, and resistivity. As resistivity varies with temperature, resistance is indirectly affected by temperature.Specifically, resistance is directly proportional to length and inversely proportional to cross-sectional area, and resistivity is the constant of proportionality.These factors apply to the conductors and all the components of your 'circuit' -including any insulation.
What is a high resistance circuit?
AnswerThe resistance of a material depends on its length, cross-sectional area, and resistivity. This is expressed by the following equation:resistance = [(resistivity x length) / cross-sectional area]So, resistance is directly-proportional to the resistivity and length of the material, and inversely-proportional to its cross-sectional area. So a high resistance can be obtained by increasing the length of the material or by decreasing its cross-sectional area, or by choosing a material with a high resistivity.It's also worth pointing out that resistivity is affected by temperature. For pure metals, the higher the temperature, the higher the resistivity, so the higher the resisistance. For example, a hot (i.e. an operating) tungsten lamp will have a much higher resistance than a cold tungsten lamp.
What happens to insulation resistance when increasing cable length?
The insulation resistance remains the same throughout the entire length of the conductor.
What is the relationship between insulation resistance and length of conductor in transformers?
when length is increased insulation resistance of cable is decresed i.e.,R is inversely proportional to L where R is resistance L is length
What is insolation resistance?
I think you mean 'insulation resistance'. This is exactly what it says it is, it is the resistance between opposite sides of an insulator or dielectric. It is in the order of megohms and, in the case of a cable, is inversely proportional to its length -i.e. the longer the cable, the lower its insulation 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 is the difference between conductor resistance and insulation resistance?
The resistance of a conductor is relatively low while an insulator should have very high resistance. The former is used to transmit electricity and the latter is designed to inhibit flow of electricity.
What is LV cable insulation resistance acceptance value?
The minimum acceptable insulation resistance value is calculated using the following formula: Rinsulation= (Vrated + 1 ) x (304.8 / L ) Where: Rinsulation is the minimum acceptable insulation resistance value, in mega-ohms; Vrated is the rated voltage of the cable (typically printed on the cable), in kilovolts; and L is the length of the cable, in meters (if the cable length is in feet, replace the number 304.8 with 1000).
What happens to the resistance as the area increases?
Double the area means half the resistance. Resistance = resistivity times length / area. Resistivity is a property of the material only.
What is the effect on the drift velocity of free electrons by decreasing the length and the temperature of wire?
As we know , resistance(R) is directly proportional to length(L) of conductor and resistence(R) is inversely proportional to current (I) and I=nAqv (v is drift velocity) So , if we decrease the length of the conductor , resistance of the conductor will decrease and current(I) will increase and drift velocity of free electrons will increase . And as we know resistance and temperature have direct relation so , by decreasing the temperature resistence will decrease and current will increase . So drift velocity will increase .
What happens to the current of the wire when the length increases?
resistance is directly proportional to wire length and inversely proportional to wire cross-sectional area. In other words, If the wire length is doubled, the resistance is doubled too. If the wire diameter is doubled, the resistance will reduce to 1/4 of the original resistance.
What three primary factors influence electrical resistance of circuit?
The resistance of any material is affected by its length, cross-sectional area, and resistivity. As resistivity varies with temperature, resistance is indirectly affected by temperature.Specifically, resistance is directly proportional to length and inversely proportional to cross-sectional area, and resistivity is the constant of proportionality.These factors apply to the conductors and all the components of your 'circuit' -including any insulation.
What happens to the resistance when length is doubled n area is quadrupled?
It is halved.It is halved.It is halved.It is halved.
How does the resistance of a wire vary with its length?
resistance of wire increases with increases of length
