Can one have a displacement current as well as a conduction current within a conductor? Explain.
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Can one have a displacement current as well as a conduction current within a conductor? Explain.
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- A silver wire has resistivity p = 1.60 × 108 Q-m and a cross-sectional area of 2.20 mm2. The current in the wire is uniform and changing at the rate of 2850 A/s when the current is 180 A. (a) What is the magnitude of the (uniform) electric field in the wire when the current in the wire is 180 A? (b) What is the displacement current in the wire at that time? (c) What is the ratio of the magnitude of the magnetic field due to the displacement current to that due to the current at a distance r from the wire? (a) Number i Units (b) Number i Units (c) Number i UnitsIn situations where a small signal must travel over a distance,a shielded cable is used in which the signal wire is surrounded by an insulator and then enclosed by a cylindricalconductor (shield) carrying the return current. Why is a“shield” necessary?A large water main is 2.25 m in diameter and the average water velocity is 6.75 m/s. If there are some slight impurities in the water, it can easily become a conductor and this flow represents a small electrical current. d = 2.25 mv = 6.75 m/s Find the Hall voltage produced if the pipe runs perpendicular to the Earth’s 5.00 × 10-5 T field.
- 2) A cross-sectional view of four long parallel conducting wires of length / and the directions of the currents are shown in the figure. Determine the magnitude and direction of the force exerted on the wire carrying current of It. 3a 312 3a 12(a) What is the maximum torque on a 181-turn square loop of wire 18.0 cm on a side that carries a 38.0-A current in a 1.60-T field? N. m (b) What is the torque when o is 20.0°? N.m1) A lamp emits radiation with an rms magnetic field strength of 3.4 x 107 T. In seconds, calculate the time it would take for a target of area 0.04 m² to absorb 310 J of energy if placed under the lamp.