A portion of length π m is cut out of a conical solid wire. The two ends of this portion have circular cross-sections of radii r1=5 cm and r2=10 cm. It is connected lengthwise to a circuit and a current I=2A is flowing through it. The resistivity of the material of the wire is ρ=1.5×10−3 Ωm. Calculate the resistance R, of the considered portion and the voltage, V developed across it.

A portion of length π m is cut out of a conical solid wire. The two e

1.	A portion of length π m is cut out of a conical solid wire. The two ends of this portion have circular cross-sections of radii r1=5 cm and r2=10 cm. It is connected lengthwise to a circuit and a current I=2A is flowing through it. The resistivity of the material of the wire is ρ=1.5×10−3 Ωm. Calculate the resistance R, of the considered portion and the voltage, V developed across it.
Answer» A portion of length $π m$ is cut out of a conical solid wire. The two ends of this portion have circular cross-sections of radii $r_{1} = 5 cm$ and $r_{2} = 10 cm$ . It is connected lengthwise to a circuit and a current $I = 2 A$ is flowing through it. The resistivity of the material of the wire is $ρ = 1.5 \times 10^{- 3} Ω m$ . Calculate the resistance $R$ , of the considered portion and the voltage, $V$ developed across it.

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