What factors affect wire resistance?
There are several factors that affect the resistance of a conductor;
- material, eg copper, has lower resistance than steel.
- length – longer wires have greater resistance.
- thickness – smaller diameter wires have greater resistance.
- temperature – heating a wire increases its resistance.
What causes resistance in a metal wire?
An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
What are the factors affecting resistance class 12?
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.
- Nature of the material of the conductor.
Which of the following factor can not affect resistance of a wire?
The resistance of a conductor does not depend on Pressure. Conductors show less resistance and Insulators show very high resistance. So it depends on the material. It is inversely proportional to the cross-sectional area of the wire.
What is specific resistance and the factors affecting the resistance?
Answer: The specific resistance of a wire depends on the temperature and the material that is used in the wire.
Why does the resistance of a metallic conductor increases with temperature?
The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increases as the temperature increases. This results in an increase in the number of collisions between the free electrons.
What are sources of resistance in metals?
The movement of electrons is hindered by vibration of the atoms in the metal lattice, which causes part of the electrical energy of the electric current to be lost – this is resistance. Since lattice vibrations increase as the temperature rises, the resistance of metals also increases as the temperature rises.
What are the factors affecting resistivity?
Factors Effecting the Resistivity of Electrical Materials
- Temperature.
- Alloying.
- Mechanical stressing.
- Age Hardening.
- Cold Working.
What are the factors depends on resistance and resistivity?
Answer
- the resistivity depends on the temperature and the material of the conductor while the resistance depends on area of cross section , length of the conductor and the nature and temperature.
- sorry.
Which factor is least likely to affect the resistance of a conductor?
Which factor is least likely to affect the resistance of a conductor? the overall shape of the conductor.
Does mass affect the resistance of a wire?
Resistance is inversely proportional to cross-sectional-area. The bigger the cross sectional area of the wire the greater the number of electrons that experience the ‘electric slope’ from the potenetial difference. This means resistance decreases.