The resistance of a long piece of copper wire is 48 2 at 20°C. a. What would the resistance be at 50°C? b. Construct a curve showing the relation between resistance and temperature.

Graphically show the effect of changes in temperature on the resistance of conductors, semiconductors, and insulators.

(1-1)The length of Copper wire is 10m and its cross-sectional area is 0.5mm² has a Calculate: a) The conductivity of Copper wire. b) the mobility of electrons in the copper wire. verify the numerical volo of resistance 0.340.

Diagram of the problem, necessary formulas, clearance and numerical solution. A steady current of 0.5 A flows through a wire. How much charge passes through the wire in one minute?

how does heat affect the resistance of most metals and their alloys?

In the figure the ideal batteries have emfs ɛ1 = 20.4 V, ɛ2 = 9.05 V, and ɛ3 = 5.40 V, and the resistances are each 2.40 Q. What are the (a) size and (b) direction (left or right) of current i,? (c) Does battery 1 supply or absorb energy, and (d) what is its power? (e) Does battery 2 supply or absorb energy, and (f) what is its power? (g) Does battery 3 supply or absorb energy, and (h) what is its power? (a) Number i Units (b) (c) (d) Number i Units (e) (f) Number i Units (g) (h) Number i Units

An 18-gauge copper wire with a diameter of 1-mm carries a constant current of 1-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the resistance, in ohms, of a 77-m wire in milli-ohm. Use resistivity equal to 1.72x10-8 ohm-m.

(A) Explain the difference between series and parallel resistor circuits in terms of (1) the physical connections (2) current & voltage flow. (B) What are the characteristics of a material that obeys ohms law?

Please ?....hy