Terms in this set (10) What would decrease the resistance of wires carrying an electric current? Current Y has a greater potential difference, and the charges flow at a slower rate.

magnetic north pole

When a conductor moves through a magnetic field, there will be a generated motional emf. This is one example of Faraday’s Law and it arises from the magnetic force. The voltage generated in a length of wire, presuming that the entire length moves through a uniform field, is given below.

What would decrease the resistance of wires carrying an electric current? higher-temperature wires. darker-colored wires. thinner wires.

R = 30 ohms.

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Conductors: Materials that offer very little resistance where electrons can move easily.

The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

Factors That Affect Resistance How much resistance a material has depends on several factors: the type of material, its width, its length, and its temperature.

Temperature is directly proportional to Resistance . So that’s why Heat is directly proportional to Resistance .

(i) Heat produced in the circuit is directly proprotional to the resistance if a constant current is flowing through a circuit, because H=I2RtorH∝R. It is so in series combination of resistors. It is so in parallel combination of resistors.

Heating a metal conductor makes it more difficult for electricity to flow through it. These collisions cause resistance and generate heat. Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.

As temperature rises, the number of phonons increases and with it the likelihood that the electrons and phonons will collide. Thus when temperature goes up, resistance goes up. For some materials, resistivity is a linear function of temperature. The resistivity of a conductor increases with temperature.