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What will the electric resistance of certain materials know as superconductors to suddenly decrease to essentially zero?
Wiki User
∙ 12y ago
The last three people who posted this question, frankly, did a
much better job of copying it from wherever it appeared first.
Wiki User
∙ 12y ago
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CAN WATER DECREASE A SUBSTANCE'S RESISTANCE TO FLOW OF ELECTRICITY?
no
Why does resistance decrease as the NTC Resitor becomes warmer?
cause it does
Can Water can decrease a substance resistance to the flow of electricity?
Reduce the temperature of the conductor.
How does a car increases and decreases friction?
To increase friction, the car goes faster so that the air resistance becomes greater. To decrease friction the car goes slower to decrease the air resistance acting on the car. Hope that helped:)
Why does decreasing the surface area of a piece of paper decrease its air resistance when it is dropped in the air?
Thanks for the Hairbrush.
What are most modern high temperature superconductors made of?
Resistance decreases with the decrease of temperature. Superconductors are made by lowering the temperature.
Why does the resistance of a thermistor decrease as the temperature rises?
Some materials have negative temperature coefficients of resistance, and some have positive temperature coefficients. Carbon is an example of a substance with a negative thermal coefficient of resistance, so it's resistance will decrease as it gets hotter.
As the resistance of a material decreases does the efficiency of power transmission increase If so is it linear relationship and what about superconductors?
Yes, the efficiency increases. Yes, it is linear. Power lost in a current-carrying conductor is: P = I^2 * R So, if you halve the resistance, you halve the power loss. Note though that the current (I) term is squared. So if you can decrease the current by increasing the transmission voltage, the increase in efficiency is not linear, but exponential! Halve the current (and double the voltage to get the same power), and you reduce losses by four times! This is why utilities use such high voltages for transmission. Superconductors are no different, you are still talking about a reduction in resistance, superconductors just achieve a much lower resistance than a standard conductor. The question is whether the cost of superconductors and their cooling systems (currently very high) outweigh the modest gain in transmission efficiency.
Does a spoiler increase or decrease air resistance?
decrease
How do you decrease voltage?
Increase resistance
How do you decrease voltage in dc without decreasing amperage?
In order to decrease voltage without decreasing amperes you have to also decrease resistance. Ohm's Law: Voltage = current times resistance
If additional resistance is connected in parallel with a circuit the supply voltage will decrease?
If additional resistance is connected in parallel with a circuit the supply voltage will decrease?
Doubling the resistance in a circuit will increase or decrease amperage?
If voltage remains constant and resistance is increased, the amperage will decrease per Ohm's Law.
Increasing voltage while maintaining the same resistance will cause current to decrease?
Decrease
How is electrical resistance decreased?
Ways to reduce electrical resistance: increase the diameter of the conductor, decrease or increase the temperature of conductor (depending on its thermal characteristics), decrease the length of the conductor. A change in the material out of which the conductor is made can decrease resistance, too. And there is the phenomenon of superconductivity. In a simple circuit the resistance can be lowered by adding resistors in parallel. The total circuit resistance will then decrease. You can also reduce resistance by substituting resistors of lower value, or by adjusting a potentiometer, or pot, to a lower value.
CAN WATER DECREASE A SUBSTANCE'S RESISTANCE TO FLOW OF ELECTRICITY?
no
When the bronchiole constricts which will happen to resistance?
decrease in oxygen provided to the alveoli
