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Mathysics
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Homework Statement
this is not a homework question... i want to know density vs resistance
Homework Equations
R = ρl/a
The Attempt at a Solution
none so far
Last edited:
and the resisitvity of the material is depending on its own density?Fightfish said:Oh dear...the rho there is not density, but the resistivity of the material. It depends on the properties of the material.
Electrical resistance is a measure of how much a material opposes the flow of electric current. It is represented by the symbol "R" and is measured in ohms (Ω).
Electrical resistance is calculated by dividing the voltage (V) by the current (I), using the formula R = V/I. This relationship is known as Ohm's law.
The factors that affect electrical resistance include the material of the conductor, its length and cross-sectional area, and the temperature. Materials with higher resistivity, longer length, and smaller cross-sectional area will have higher resistance. Additionally, as temperature increases, resistance also increases.
Electrical resistance is the measure of how much a material opposes the flow of electric current, while conductivity is the measure of how easily electric current can pass through a material. They are inversely related, meaning that a material with high resistance will have low conductivity, and vice versa.
Electrical resistance plays a crucial role in determining the behavior of electrical circuits. It limits the flow of electric current, which can cause voltage drops and affect the overall performance of the circuit. It is also used to control the amount of current flowing through different components in a circuit.