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Why do the values of resistivity differ so much between materials?
The values of resistivity differ between materials due to variations in their atomic structure, electron configuration, and bonding characteristics. Materials with more free electrons, such as metals, have lower resistivity, while insulating materials with tightly bound electrons have higher resistivity. The presence of impurities and defects in a material can also influence its resistivity.
What is meant by Reluctance Torque?
Reluctance torque is the torque generated in a reluctance motor due to the tendency of the rotor to align itself with the stator magnetic field. It occurs as a result of the variation in reluctance in the magnetic path between the rotor and stator. This torque is responsible for the motion of the motor and is one of the main torque components in reluctance motor operation.
What is the difference between resistance and the resistivity?
Resistance is the value of a given wire in ohm but resistivity is value of the material with which that wire is made in ohm meter. R = rho * L / A Here rho is resistivity and R is resistance. L is the length of the wire and A is area of cross section
Can you use copper wire instead of eureka wire in finding its resistivity?
Yes, you can use copper wire instead of eureka wire to determine resistivity by measuring its resistance, length, and cross-sectional area. However, keep in mind that the resistivity values for copper will be different from eureka wire, so you will need to account for that difference in your calculations.
If the diameter of wire is double what is resestivity?
Resistivity won't change. Resistivity is a material property that doesn't depend on the shape.
What is the difference between metal and semiconductor?
A semiconductor's resistivity decreases with increasing temperature. A metal's resistivity increases with increasing temperature.
Why do the values of resistivity differ so much between materials?
The values of resistivity differ between materials due to variations in their atomic structure, electron configuration, and bonding characteristics. Materials with more free electrons, such as metals, have lower resistivity, while insulating materials with tightly bound electrons have higher resistivity. The presence of impurities and defects in a material can also influence its resistivity.
How are materials classified on the basis of resistivity?
Materials can be classified based on their resistivity as conductors, semiconductors, or insulators. Conductors have low resistivity, allowing electric current to flow easily. Semiconductors have resistivity in between conductors and insulators, and their conductivity can be controlled. Insulators have high resistivity and do not allow electric current to flow easily.
What is meant by Reluctance Torque?
Reluctance torque is the torque generated in a reluctance motor due to the tendency of the rotor to align itself with the stator magnetic field. It occurs as a result of the variation in reluctance in the magnetic path between the rotor and stator. This torque is responsible for the motion of the motor and is one of the main torque components in reluctance motor operation.
Formulas in wenner and schlumberger configurations in ers?
In Electrical Resistivity Surveying (ERS), the Wenner and Schlumberger configurations are commonly used for measuring subsurface resistivity. For the Wenner configuration, the apparent resistivity (( \rho_a )) is calculated using the formula: [ \rho_a = 2\pi a V/I ] where ( a ) is the electrode spacing, ( V ) is the measured potential difference, and ( I ) is the current applied. In the Schlumberger configuration, the formula is similar but accounts for the larger distance between the outer electrodes: [ \rho_a = \frac{2\pi (AB)^2}{(AB - a)V/I} ] where ( AB ) is the distance between the outer electrodes and ( a ) is the distance between the inner electrodes. Both configurations help in interpreting subsurface resistivity variations.
How are substances classified on the basis of resistivity?
Substances are classified based on their resistivity as conductors, insulators, or semiconductors. Conductors have low resistivity and easily allow the flow of electric current. Insulators have high resistivity and inhibit the flow of electric current. Semiconductors have resistivity values between conductors and insulators, making them suitable for controlling the flow of current in electronic devices.
What is the relationship between resistivity and circumference?
The relationship between resistivity and circumference is inverse.The resistance of a substance decreases as the surface area of that substance increases. The greater circumference presents a greater conduction surface.AnswerThe original answer describes resistance, NOT resistivity. Additionally, it is incorrect because resistance is inversely-proportional to cross-sectional area NOT circumference!There is NO relationship between resistivity and the circumference of a material. Resisitivity is a constant at any given temperature and is completely unaffected by the dimensions of a material.
Why is resistivity of a semiconductor higher than that of a metal?
Resistivity is the resistance, in ohms, between the opposite faces of a 1-metre-cube of a material. For metals, resistivity is in the region of 0.0000001 ohm-metre. For semiconductors, it is much higher - it is in the region of 0.01 ohm-metres.
What is the difference between resistance and reluctance?
Better nuances are doubtless available via the Oxford English Dictionary, and in some cases of common usage they're probably almost interchangeable. But there is a real difference. I'd say resistance is more active and reluctance is more passive; i.e., in the case of resistance one is more likely to take some sort of action to register the desire not to do what's being asked; in the case of reluctance one may exhibit "symptoms" of not wanting to do what's being asked, or even express one's unwillingness verbally, but implicit in the word "reluctance" is that one is more likely to go ahead and do it anyway.
What is the difference between resistance and the resistivity?
Resistance is the value of a given wire in ohm but resistivity is value of the material with which that wire is made in ohm meter. R = rho * L / A Here rho is resistivity and R is resistance. L is the length of the wire and A is area of cross section
Resistivity range of semiconductors lies between the range of?
Semiconductors have bulk resistivity in the range of 10-4 ohm-cm (heavily doped) to 103 ohm-cm (undoped, or intrinsic).
What is the noun form of reluctance?
"Reluctance" is a noun.
