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What is the effect of the temperature on the resistance?
It varies. On some items resistance goes up, some it goes down when temperature goes up.
What is effect of temperature on resistance of a wire?
As temperature increases, the resistance of a wire also increases. This is because as the temperature rises, the atoms in the wire vibrate more vigorously, causing more collisions with electrons and impeding the flow of current. This relationship between temperature and resistance is known as the temperature coefficient of resistance.
Is the armature resistance substantially the same for every rotational?
The armature resistance in a motor or generator is generally considered to be relatively constant across different rotational speeds, as it primarily depends on the physical properties of the winding material and geometry. However, factors such as temperature changes and the skin effect at high frequencies can cause slight variations in resistance. Overall, while the armature resistance remains consistent under normal operating conditions, it can exhibit minor changes under specific circumstances.
Does temperature increase affect resistance?
Yes. The exact effect - whether it increases or decreases - depends on the material.
What is a air temp sensor?
IAT air intake sensor is a thermistor ( a resistor that varies the value of it's resistance in accordance with temperature changes ) the change in the resistance values will directly effect the voltage signal from the sensor to the PCM/ECM. As the sensor temperature increases, the resistance values will decrease. As the sensor temperature decreases the resistance values will increase.
What factors effect the resistance of a conductor?
Factors affecting the resistance of a conductor include the material from which it is made, its length, its cross-sectional area, and its temperature.
How does a thermistor effect the resistance of the temperature?
A thermistor is a type of temperature-sensitive resistor whose resistance changes significantly with temperature variations. Specifically, negative temperature coefficient (NTC) thermistors decrease in resistance as temperature increases, while positive temperature coefficient (PTC) thermistors increase in resistance with rising temperature. This property allows thermistors to be used in temperature sensing and control applications, enabling precise monitoring and regulation of temperature-dependent processes. Their sensitivity makes them suitable for various electronics, including temperature sensors and circuit protection devices.
What happens to the resistance of a material with a positive temperature coefficient when it is heated?
Positive Temperature coefficient indicates that the resistance of material INCREASES with rise in the temperature. Resistance Temperature COefficient(RTC) is defined as increase in resistance per unit original resistance per unit rise in temperature. Temperature Coefficient of Resistance=R2-R1/(R1*(T2-T1)) Where: R2:Resistance at temperature T2 R1:Resistance at temperature T1 SO from formula it is clear that if resistance increases with temperature(T2-T1>0 and R2>R1) then Difference R2-R1 will be positive hence RTC will have positive value. But if with increase in temperature(T2-T1>0) resistance decreases(R2<R1) then difference R2-r1 will be negative hence RTC will be negative.
What is the formula to calculate AC resistance if the DC resistance is known?
AC resistance is the term used to describe the elevated value of resistance due to the reduction in a conductor's effective cross-sectional area due to the the skin effect caused by an alternating current. The skin effect describes how AC current tends to flow towards the surface of a conductor, rather than being distributed across the entire cross-sectional area as is the case for a DC current.For 50/60 Hz supplies the skin effect is not great and, so, there will not be a great difference between the DC resistance and AC resistance of a winding. Accordingly, it will be very difficult to calculate the winding's AC resistance, as its value is likely to be masked by experimental error and the accuracy of the instruments.In theory, by using a wattmeter and an ammeter, the resistance of a load -in this case a winding- the readings can be inserted into the equation: R = P/I2. Using a DC supply will reveal the (DC) resistance value, and using an AC supply will reveal the AC resistance value. As explained, a combination of experimental error and instrument accuracy is very likely to mask any actual difference between the two resulting values.So, at mains' frequencies, the difference between AC resistance and actual (DC) resistance would be very difficult to determine with any degree of accuracy.
What is the effect of temperature on resistance of different metals?
with increase temperature in metal, thermal energy causes atoms in metal to vibrate, in this excited state atoms interact with and scatter electrons, thus decreasing the mean free path, and hence the mobility of electrons to decreases and resistivity increase(Resistivity = 1 / Conductivity )so conductivity of metal decrease as increasing in temperature
If a Scientist is studying the effect of concrete on urban climates what unit of measurements is most appropriate for the scientist to use to record temperature in her study?
degrees C
What causes resistance to increase or decrease?
Voltage, if voltage is increased resistance in the circuit increasesAnswerResistance is determined by the length, cross-sectional area, and resistivity of a conductor. Resistivity is, in turn, affected by temperature -so temperature indirectly affects resistance.These are the only factors that affect resistance. Voltage and current have no direct effect whatsoever on resistance. Current can affect resistance indirectly if it causes the conductor's temperature to increase.For AC circuits, 'skin effect', due to frequency, causes the current to flow towards the surface of a conductor which acts to reduce the effective cross-sectional area of that conductor. So, frequency can also indirectly affect resistance.
