When a voltage difference is applied to a piece of silver wire, a 20.0 mA current flows. If the silver wire is replaced with a copper wire with twice the diameter of the silver wire, how much current will flow through the copper wire? The lengths of both wires are the same, and the voltage difference remains unchanged. (The resistivity of copper is 1.68 x 1080 m, and the resistivity of silver is 1.59 x 108 2.m.) 33.7 mA 75.7 mA 5.0 mA 80,0 mA 4.73 mA

When a voltage difference is applied to a piece of silver wire, a 20.0 mA current flows. If the silver wire is replaced with a copper wire with twice the diameter of the silver wire, how much current will flow through the copper wire? The lengths of both wires are the same, and the voltage difference remains unchanged. (The resistivity of copper is 1.68 x 1080 m, and the resistivity of silver is 1.59 x 108 2.m.) 33.7 mA 75.7 mA 5.0 mA 80,0 mA 4.73 mA