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What is thermistorhow is it works?
A thermistor is a temperature sensitive resistor, there are two types: 1) If the temperature rise the resistance will go higher 2) If the temperature rise the resistance will go lower ...
What is swamping resistance?
(Electronics) Resistor placed in the emitter lead of a transistor circuit to minimize the effects of temperature on the emitter-base junction resistance and its resistance is called swamping resistance. ...
What happens to the resistance through a resistor as the potential difference across a resistor changes?
A resistor will not change its value, unless the voltage exceeds the designed power capacity of the resistor. As the voltage increases, the current will increase, if the current gets too high it will cause the temperature of the resistor to increase, if the temperature exceeds the power rating of the resistor then the resistance WILL change. If it goes too High in temperature the resistor will open and current will no longer flow. A resistor is used to control current, and...
What is the relationship between Wattage and resistance of resistor?
There is no direct relationship. Power ('wattage') is a measure of the rate at which the resistor can dissipate energy; excessive power means that a resistor cannot dissipate energy fast enough to prevent its temperature becoming excessive -excessive enough to damage the resistor. As the rate at which a resistor can dissipate energy is determined by its physical size, a resistor's power rating (maximum continuous power it can handle without exceeding its rated temperature) depends on the physical size of the resistor. On the other hand,...
Asked in Ford Explorer Eddie Bauer
What is the difference between an ohmic resistor and a non-ohmic resistor?
A non-ohmic resistor doesn't have a constant resistance. A ohmic resistor has a constant resistance. ...
Asked in Electronics Engineering
Does a variable resistor have Has a fixed resistance?
A variable resistor means that the resistance can be varied, usually by using a slide. A fixed resistor can not be varied. ...
Asked in Units of Measure
How do scientists measure temperature in very cold places?
Scientists can use a electrical resistance thermometer, The resistance varies as a function of heat. If the resistance gets higher as temperature gets higher the resistance is said to have a positive temperature coefficient. If the resistance decreases as temperature increases, it is said to have a negative coefficient. The resistance thermometer in its simplest form is a series circuit containing a battery, thermal resistance, ammeter, and current limiting resistor. ...
What is the value of a resistor when current and voltage are both zero?
The value can be anything. As long as the resistance is not zero, if the voltage across the resistor is zero the current through the resistor will also be zero. The relevant equations is... Voltage = Resistance x Current In the special case of superconductivity, the resistance is zero and you can have a current even if the voltage is zero. Answer Resistance is affected by the length of a material, its cross-sectional area, and its resistivity (which, in turn, is affected by temperature). The resistance...
What do you mean by tolerance of resistor?
The tolerance of a resistor is basically a measure of how close the actual resistance of that particular resistor is to the stated resistance. For example, a "220 ohm" resistor with a tolerance of 10% (silver band) has an actual resistance somewhere between 198 and 242 ohms....
Asked in Car Starting Problems
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. ...
When a 1 ohm resistor and a 1 ohm resistor are connected in series what is their conbined resistance?
The combined resistance will be 2 Ohms.
What resistance must be connected in parallel to 6.0-ohm resistor to reduce the combined resistance to 15-ohm?
No such resistor exists. Any resistor placed in parallel with a 6.0 ohm resistor is going to reduce the combined resistance below 6.0 ohms. ...
What is the purpose of the series resistor in your designed ammeter circuit?
You appear to be referring to a 'swamping resistor' which is connected in series with a moving-coil ammeter's moving coil. To minimise any errors due to temperature changes in the resistance of the instrument's moving coil, the coil is connected in series with what is termed a 'swamping resistor' whose resistance is large in comparison with that of the moving coil, and which is manufactured from an alloy with a very low temperature coefficient of resistance (i.e. a metal whose resistance is hardly effected...