Resistance is defined as the property of a conductor to resist the flow of charges through it. The resistance of conductor is numerically given as the ratio of potential difference across its length to the current flowing through it.
Q. What are the 4 factors that affect the resistance of a wire?
There are 4 different factors which affect resistance:
Table of Contents
- Q. What are the 4 factors that affect the resistance of a wire?
- Q. On what factors does the resistance of a conductor depend Class 10?
- Q. What is Ohm’s law on what factor does the resistance of conductor depend upon?
- Q. What is the resistance of a conductor?
- Q. Do good conductors have high resistance?
- Q. Which conductor has highest resistance?
- Q. Does high conductivity mean low resistance?
- Q. What happens to resistance when the conductor diameter is increased?
- The type of material of which the resistor is made.
- The length of the resistor.
- The thickness of the resistor.
- The temperature of the conductor.
Q. On what factors does the resistance of a conductor depend Class 10?
The resistance of the conductor depends on the following factors: The temperature of the conductor. The cross-sectional area of the conductor. Length of the conductor.
Q. What is Ohm’s law on what factor does the resistance of conductor depend upon?
Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Therefore, V = RI where R is a constant called resistance. R depends on the dimensions of the conductor and also on the material of the conductor. Its SI unit is Ohm (Ω).
Q. What is the resistance of a conductor?
Q. Do good conductors have high resistance?
Conductors have a very low resistance to electrical current while insulators have a very high resistance to electrical current. These two factors become very important when we start to deal with actual electrical circuits.
Q. Which conductor has highest resistance?
Resistivity and Temperature Coefficient at 20 C
| Material | Resistivity ρ (ohm m) | Conductivity σ x 107 /Ωm |
|---|---|---|
| Silver | 1.59 | 6.29 |
| Copper | 1.68 | 5.95 |
| Copper, annealed | 1.72 | 5.81 |
| Aluminum | 2.65 | 3.77 |
Q. Does high conductivity mean low resistance?
The unit of conductivity is the Siemen (S). A millisiemen (mS) = 1/1,000 S, a microsiemen (µS) = 1/1,000,000 S. Conductivity is also referred to as electrical conductivity (EC) or specific conductance. Resistivity units are expressed in Ohms (Ω)….Understanding. Low-Conductivity/High-Resistivity. Measurements.
| Conductivity | Resistivity |
|---|---|
| 100 µS | 0.01 MΩ |
| 1 mS | 1 kΩ |
Q. What happens to resistance when the conductor diameter is increased?
The cross-sectional area is the area of the end of the wire (assuming a perfectly flat right-angle cut). So it’s proportional to the square of the diameter. Resistance is inversely proportional to the cross-sectional area. In this case since lenght is halfed and area is doubled resistance decreases by 4 times.
