Taking R = 1.60 kN and E = 210 V in the figure below, R 2R be 28 4R 3R determine the direction and magnitude of the current in the horizontal wire between a and e. O not enough information to decide O from a to e O from e to a
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- What are the magnitude and direction of the unknown current in the fifth wire? 3 A. 6 A 2 A 4 A 1A, into the junction 3A, into the junction O 3A, out of the junction O 1A, out of the junctionIf gold (PAu = 2.44 x 10-8 N. m) and silver (PAg = 1.59 × 10-8 n. m) wires of equal length are found to have the same resistance. 4 a) Find the ratio of their radii (rAL/r Cu)? b) Which element (Au or silver) is better for conducting electrical current? Explain. LEGOO Macmillan Learning Two insulated copper wires of similar overall diameter have very different interiors. One wire possesses a solid core of copper, with a circular cross section of radius 3.03 mm. The other wire is composed of 19 strands of thin copper wire bundled together. Each strand has a circular cross section of radius 0.606 mm. The current density J in each wire is the same. J = 1350 A/m² How much current does each wire carry? solid wire current: A solid wire resistance: The resistivity of copper is p = 1.69 × 10-8 Q.m. What is the resistance of a 1.75 m length of each wire? stranded wire current: Ω stranded wire resistance: A Ω
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