answersLogoWhite

0

Because by varying temperature ,the conductivity hence the resistivity varies so the constant varies.

User Avatar

Wiki User

13y ago

What else can I help you with?

Related Questions

What is the main objection of ohm's law in measuring resistance?

Temperature. Ohms law is applicable to measure resistance of an element at constant temperature only.


Why is R Introduced in ohms law?

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.


The voltage drop in each resistance is?

V=IR by ohms law. Voltage across the resistor is the product of current flowing and resistance of the conductor at constant temperature.


What is ohms law constant of proportionality?

1 volt applied across one ohms Will conduct one Ampere


What does thirty five degrees Celsius convert to in ohms?

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.


How powerful are ohms?

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.


What is the total current in a circuit that has two heating elements that have a resistance of 5 ohms and 20 ohms the elements are connected in parallel with each other and connected to a 200 volt pow?

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.


What is difference between resistance and reactance while both are measured in ohms?

Resistance is constant no matter the frequency applied. Reactance varies depending on the frequency of the power applied to it.


What does 425 degrees Fahrenheit to in ohms?

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.


What is the significance of the constant temperature reference in ohms law?

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.


What is the ohmic value of two wire rtd?

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.


What is 2.561 K equals how many ohms?

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.