A copper wire of length L and cross-sectional area A carries a current I. If the current in the wire is doubled, how are each of the following affected? (a) The charge carrier density ---Select--- (b) The current density ---Select--- (c) The electron drift velocity ---Select---
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- Determine the value current supply (Is) Vs.= 12 v |2kR 18kn Is VsWhat would happen to the temperature and the resistivity value of a wire if the current were very large?For some materials, the ratio of the current density to the applied electric field is constant and is equal to the of the material. The answer cannot be found on the other choices. resistivity: conductance: resistance;
- A half-coned shaped resistor shown in Figure is composed of two different ohmic materials with different resistivities. materials are shaped into individual cones of radii R, and R, .The total length of the half cone is L. Which of the statements about the total resistance of the composed material for currentthrough the length of the half cone islare true? I) It is constant for a given temperature. I) It is not constant because the cross sectional are which the current passes is not constant. I) It is not constant because the composed material does not have a uniform resistivity. MIt is constant as long as the current passing is constant. O A) Il and II O B) I and IV6- chapter27-question17 A small current of 1.5x 10 10 A exists in a copper wire whose radius is 1.0 mm. The number of charge carriers per unit volume is 9.0 x 10 m³. Assuming the current is uniform, calculate the electron drift speed in m/s. (n = 3.14, qe = 1.6 × 10~1ºC) Option1 Option2 Option3 Option4 Option5 1.6 x 10-14 | 3.3 × 10-14 4.7 x 10 14| 5.1 x 10-14 | 0.8 x 10-14 a) Option5 b) Option1 c)O Option4 d) O Option3 e) Option2 O Boş bırak3) The figure below shows, as a function of time, the energy dissipated in a resistor. Rank the lettered time periods according to (a) the current through the resistor and (b) the rate of dissipation in the resistor, greatest first. E