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R is the electrical resistance,A is the cross-sectional area,l is the length of the piece of material.
What else can I help you with?
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.
Is resistivity of conductor independent of charge?
Yes, resistivity, which is a material property, is independent of the amount of charge. Resistivity is determined by the material itself, while the amount of charge only affects the flow of current through the conductor.
What are Disadvantages of two probe method to measure resistivity?
One disadvantage of the two-probe method to measure resistivity is that it can introduce errors due to contact resistance at the probe-sample interface. Additionally, the measurement may not accurately capture the true resistivity of the sample if the probe spacing is large compared to the sample size. Finally, the two-probe method is not suitable for measuring resistivity in materials with high contact resistance or non-uniform resistivity distributions.
What physical properties may change resistivity?
Resistivity can be affected by several physical properties, including temperature, impurities, and structural defects within a material. As temperature increases, the resistivity of conductors typically rises due to increased atomic vibrations that hinder electron flow. In contrast, semiconductors may exhibit decreased resistivity with rising temperature due to enhanced carrier mobility. Additionally, the presence of impurities or defects can disrupt the lattice structure, leading to changes in resistivity by altering the number of charge carriers or scattering mechanisms.
What is the Electrical Resistivity of Silicone Rubber?
Nearly infinity.
What are the formulae of resistivity?
There is no 'formula' for resistivity. The resistivities of different conductors have been determined by experiment.
What is the formula for resistivity?
Resistance (Ohms) = Voltage (v) / Current (I)
What is the formula in finding the reduced size wire if the resistivity is increased?
L1-L0=(RESISTANCE*AREA)/RESISTIVITY where L1=INIIAL LENGTH and L2=FINAL LENGTH
Does resistivity depend on length and area of the cross section of the material?
No. Resistivity is a material constant, defined for a standard size of material. For another size of material, it can be calculated. Resistivity is the same for any piece of material; resistance can change.
What change in resistivity if length is doubled?
Resistivity is a property of a substance, and doesn't depend on the dimensions of a sample. If the length of a conductor is doubled, then its resistance doubles but its resistivity doesn't change.
What is the formula for calculating resistance if the resistivity is 4.3 10-3 A?
The formula for calculating resistance (R) using resistivity (ρ) is given by ( R = \frac{\rho \cdot L}{A} ), where ( L ) is the length of the conductor and ( A ) is the cross-sectional area. In the given context, if the resistivity is ( 4.3 \times 10^{-3} , \Omega \cdot m ), you would need the length and cross-sectional area of the conductor to calculate the resistance. Without those values, the resistance cannot be determined solely from the resistivity.
Does resistivity depends upon dimension of the conductor?
Yes, resistivity does depend on the dimensions of the conductor. The resistivity of a material is an intrinsic property, but the resistance of a conductor is also influenced by its dimensions such as length, cross-sectional area, and shape. These dimensions affect the resistance of the conductor through the formula R = ρ * (L/A) where ρ is resistivity, L is length, and A is the cross-sectional area.
A cylinder if material is 10 cm and has a cross section of 2 cm if its resistance along the length b 20 ohm what will be its resistivity in si unit?
The resistivity of the material can be calculated using the formula: resistivity = resistance x cross-sectional area / length. Plugging in the values: resistivity = 20 ohm x 2 cm / 10 cm = 4 ohm cm. Since resistivity is measured in ohm meters (SI unit), the resistivity of the material in SI unit would be 0.04 ohm meter.
What is the resistance formula?
R= ρL/A ρ- electrical resistivity of the materialL- length of the conductor.A- cross sectional area of the conductor.
How can you measure resistivity from a graph?
Take measurements of resistances of various lengths of a wire of constant diameter. Make a graph of resistance against length / cross-sectional area of wire. The gradient of the straight line section will be equal to the resistivity of the wire.
Would have the same resistance as a copper wire that is 4 m long and has a cross-sectional area of 0.066 cm2?
A wire with the same resistance as the given copper wire would have the same resistivity as copper. The resistance of a wire is dependent on its resistivity, length, and cross-sectional area. To calculate the resistance of a wire, use the formula R = (resistivity * length) / area; however, without the specific resistivity value, an exact value cannot be provided.
How do you convert conductivity to resistivity?
Oh, dude, it's like this: to convert conductivity to resistivity, you just take the reciprocal of the conductivity value. So, resistivity is equal to 1 divided by conductivity. It's like flipping a coin, but with numbers. Easy peasy, right?
