The two segments of the wire in Figure P22.59 have equal diameter and equal leng

Question

The two segments of the wire in Figure P22.59 have equal diameter and equal lengths but different resistivities row_1 and row_2. Current I passes through this wire. If the resistivities have the ratio row_2/row_1 = 2, What is the ratio deltaV_1/deltaV_2 of the potential differences across the two segments of the wire? A long wire used as a heating element carries a current of 0.80 A. It dissipates 6.0 W for every meter of length. What is the electric field strength inside this wire? A wire is 2.3 m long and has a diameter of 0.38 mm. When connected to a 1.2 V battery, there is a current of 0.61 A. What material is the wire likely made of? The filament of a 100 W (120 V) lightbulb is a tungsten wire 0.035 mm in diameter. At the filment's operating temperature, the resistivity is 5.0 times 10^-7 ohm m. How long is the filament? you've made the finals of the Science Olympics! As one of and asked to make of

Explanation / Answer

Here,

Current , I = 0.80 A

Power per m = 6 W

as P = V * I

6 = 0.80 * V

V = 7.5 V/m

as the potential per m is electric field

the electric field is 7.5 V/m

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