Using the atomic model of matter, explain why the resistance of a metal varies with its temperature.

are made of the same metal. 7) wires 1 and 2 wire 2 has twice the length and twice the diameter of wire 1. What are the ratios (a) Q₂/Q² of the resistivities and (b) R.2/121 of the resistance of the two wires? A) P₁/P₁ = 1, 1₂/1²₁=0.5 13) P₂/p₁ = 1, 82₂/124₁ =0.25 C) P₁/P₁ = 0.5² h₂/1²₁=0.5 D) P₁/P₁ = 0.25, 1₂₁/1²₁=0.5 2 र

The resistance of a wire increases by 22 percent when the temperature of the wire is increased from 10 degrees C to 105 degrees C. What is the temperature coefficent (a) of the wire's material?

The circuit shown in the diagram contains a battery and two wires made of the same material, but with different diameters. Each wire is 10 cm long, has 7 x 1027 mobile electrons per cubic meter, and an electron mobility of 5 x 10-5 (m/s)/(V/m). The diameter of wire 1 is 3 mm, and the diameter of wire 2 is 0.8 mm. Location A is inside wire 1, and location B is inside wire 2. A steady state current flows through the circuit. Show Transcribed Text B wire 1 wire 2 What is average drift speed of electrons at location B, inside wire 2? VB = m/s