A 490-W heating coil designed to operate from 110 V is made of Nichrome wire 0.420 mm in diameter. (Assume ρ = 1.50  10-6 Ω · m, and α = 4.000  10-4(°C)−1 for Nichrome.) (a) Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used.  m (b) Now consider the variation of resistivity with temperature. What power is delivered to the coil of part (a) when it is warmed to 1 200°C?

Q: A temperature-stable resistor is made by connecting a resistor made of silicon in series with one…

A: The temperature coefficients of resistivity (resistance) of silicon and iron are given by:

Q: The resistance R of a copper wire at temperature T = 22°C is R = 13 2. Estimate the resistance at T…

A: Given data The initial resistance is, R1=13 Ω The initial temperature is T1=22oC The final…

Q: A temperature-stable resistor is made by connecting a resistor made of silicon in series with one…

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Q: A copper wire of radius a=0.306 mm has an aluminum jacket of outer radius b-0.402 mm. There is a…

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Q: (a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm.   (b)…

A: Ohm's Law The potential difference across a conductor is directly proportional to the current…

Q: When an electric heater is turned on, the Nichrome heating element is at 0 degrees C and draws a…

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Q: Calculate the drift velocity of electrons in a copper wire with a diameter of 2.053 mm (12-gauge)…

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Q: 5 The resistivity of Nichrome is about 100 times that of copper, a typical good conductor. a copper…

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Q: The resistance R of a copper wire at temperature T = 30°C is R = 13 Q. Estimate the resistance at T…

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Q: A 560-W heating coil designed to operate from 110 V is made of Nichrome wire 0.640 mm in diameter.…

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Q: A wire of Nichrome is 1.0 m long and 2.5 mm2 in cross-sectional area. It carries a current of 4.0 A.…

A: Given data: Potential difference (V) = 12 V Current (I) = 4 A Length of Nichrome wire (L) = 1.0 m…

Q: A nichrome wire and an aluminum wire, each with the same initial resistance, have the same change in…

A: Given 𝜌𝐴𝑙=2⋅82×10−8𝛺−𝑚 𝛼𝐴𝑙=3⋅9×10−3𝑜𝐶−1 𝜌𝑛𝑖=2⋅5×10−6⋅𝛺−𝑚 𝛼𝑛𝑖=0.4×10−3𝑜𝑐−1

Q: A 400-W heating coil designed to operate from 110 V is made of Nichrome wire 0.440 mm in diameter.…

A:

Q: (a) A 33.5-m length of copper wire at 20.0°C has a radius of 0.29 mm. If a potential difference of…

A: Given : L = 33.5 m To = 20°C r = 0.29 mm = 0.29 x 10-3 m ∆V = 8 V T = 34°C

Q: You measured the potential difference along the Al (Aluminum) wire while uniform current was flowing…

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Q: Calculate the drift velocity of electrons in a copper wire with a diameter of 2.053 mm (12-gauge)…

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Q: (a) To what temperature must you raise a copper wire, originally at 20 °C, to double its resistance…

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Q: When 134 V is applied across a wire that is 12 m long and has a 0.40 mm radius, the magnitude of the…

A: To find the resistivity of the wire, we can use Ohm's law and the formula for current density.Ohm's…

Q: Nichrome wire is used in some radiative heaters. (a) Find the resistance needed if the average power…

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Q: The heating coil in a coffee maker is made of nichrome wire with radius of 0.225 mm. If the coil…

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Q: A rod of semiconducting material of length L = 10 m and cross-sectional area A = 4.5 mm² lies along…

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Q: (a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ₁ = 2.7…

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.