Because by varying temperature ,the conductivity hence the resistivity varies so the constant varies.
A sensistor is an electronic component that detects and measures specific physical conditions, such as light or sound, and converts them into electrical signals. A thermistor, on the other hand, is a type of resistor that changes resistance according to changes in temperature. While both are sensors, they serve different purposes based on the physical property they measure.
The time constant (τ) of a circuit consisting of an inductor (L) and a resistor (R) in series is given by the formula τ = L/R. In this case, with L = 50mH and R = 200 ohms, the time constant would be τ = (50mH) / (200 ohms) = 0.25 milliseconds.
The measure of how difficult it is for charges to flow through a material is called electrical resistance. It is quantified in ohms and is determined by factors such as material composition, dimensions, and temperature.
Electrical resistance, measured in Ohms
The resistance of the circuit is measured in ohms.
Temperature. Ohms law is applicable to measure resistance of an element at constant temperature only.
Ohms law in most simplest form states that for a given conductor at a constant temperature current and voltage are directly related. ie V proportional to I. To equate any terms we need a equality sign and in order to make it a equality relation we introduce a constant, resistance. It is an inherent property of the system that doesn't vary for given dimension and temperature.
V=IR by ohms law. Voltage across the resistor is the product of current flowing and resistance of the conductor at constant temperature.
1 volt applied across one ohms Will conduct one Ampere
Temperature in degrees Celsius cannot be directly converted to ohms as they are different units of measurement. Ohms are used to measure electrical resistance whereas degrees Celsius measure temperature.
Ohms do not relate to power per se. Ohms do however contribute how much power a circuit can deliver. In a given circuit the lower the resistance (measured in ohms) the higher the current & higher the power. This is assuming the voltage remains constant.
5 ohms in parallel with 20 ohms is 4 ohms. 4 ohms across 200 volts is 50 amperes. However, resistance is a function of temperature, so the 4 ohms will probably be higher, reducing the current. How much depends on the temperature coefficient of the loads.
Resistance is constant no matter the frequency applied. Reactance varies depending on the frequency of the power applied to it.
Temperature (in degrees Fahrenheit) cannot be directly converted to resistance (in ohms), as they are different units of measurement. Temperature is a measure of thermal energy, while resistance is a measure of opposition to electric current flow in a circuit.
As temperature affects resistivity, the resistance of a conductor may change if its temperature is allowed to increase. For pure metal conductors, the resistance generally increases as the temperature increases.Ohm's Law ('the current flowing along a conductor, at constant temperature, is directly proportional to the potential difference across that conductor') only applies when the resistance of the conductor is constant so, when verifying Ohm's Law, the temperature must be kept constant, in order to keep the resistance constant.It should be pointed out that the ratio of voltage (U) to current (R) is called resistance (R), and the resistance of a circuit can be found from the equation, R = U/I whether Ohm's Law applies or not -but Ohm's Law itself only applies when the ratio is constant over a range of voltage variation.
The ohmic value of a two-wire RTD (Resistance Temperature Detector) typically ranges from 100 ohms to 1000 ohms at 0°C. This value increases with temperature due to the positive temperature coefficient of the RTD material.
To convert temperature to resistance, you will need to know the specific material's temperature coefficient of resistance. This coefficient determines how much a material's resistance changes per degree temperature change. Without this information, it is not possible to accurately convert temperature to resistance.