A 620-W heating coil designed to operate from 110 V is made of Nichrome wire 0.240 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.   (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: Consider an aluminum wire of diameter 0.700 mm and length 20.0 m. The resistivity of aluminum at…

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Q: (25%) Problem 6: A copper wire has a resistance of 0.495 at 20.0°C, and an iron wire has a…

A: Let at temperature T  Riron = Rcu  .535[1+5×10^-3(T-20)] = .495 [1+3.9×10^-3(T-20)]…

Q: A toaster has a heating element of resistance Ro=10.0 2 at To=20 °C. The resistance increases to…

A: Given: Toaster initial resistance, R0=10 Ω at temp. T0=20 °C Toaster resistance increased value,…

Q: A resistor made of nichrome wire is used in an application where its resistance cannot change more…

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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: The heating coil in an electric tea pot is made of nichrome wire with a radius of 0.275 mm. If the…

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Q: The heating coil in an electric tea pot is made of nichrome wire with a radius of 0.375 mm. If the…

A: The answer is given below Explanation:Step 1:(a) 14.37 ohm(b) 4.23 mStep 2:Step 3: Step 4:

Q: A composite conductor 10 [m] long consists of an inner core of steel with radius 1.5 [cm] and an…

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Q: The heating coil in a toaster is made of nichrome wire with a radius of 0.275 mm. If the coil draws…

A: Given data: Radius (r) = 0.275 mm = 0.275×10-3 m Current (I) = 8.40 A Voltage (V) = 120 V…

Q: (b) A voltage of 3 V is applied across the ends of a copper alloy conductor which has a resistance…

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Q: The temperature coefficient of a certain conducting material is 4.78 × 10-3 (°C)-1. (a) At what…

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Q: Given the temperature coefficient of resistivity of a certain wire to be 2 x10−3 (°C)−1.By what…

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Q: (a) A well-insulated electric water heater warms 119 kg of water from 20.0°C to 55.0°C in 23.0 min.…

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Q: R4 ww AV 2 R1 R3 R5 R2

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Q: A toaster using a Nichrome heating element operates on 120 V. When it isswitched on at 20°C, the…

A: Given: Voltage V=120V Initial current(I1)=1.35A Final Current(I2)=1.23A Initial temperature(T2)=20°C…

Q: A copper pipe (with inner diameter 20.0 mm and outer diameter 22.2 mm) is connected to a 12.0 V car…

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Q: (a) Find the current through the resistor in the figure above. (Take R = 4 Ω.) (b) If the resistor…

A: Given Data  Resistance R = 4Ω Voltage Vba = 12V Increased Temperature Tf =1480C  The Coefficient of…

Q: A 640-W heating coil designed to operate from 110 V is made of Nichrome wire 0.700 mm in diameter.…

A: a. the resistance of the coil can be calculated as follows,

Q: A heating element has a temperature coefficient = 0.005 °C-1 is operated at a constant voltage Vo At…

A: Given that temperature coefficient of heating element and initial and final value of current and…

Q: The heating coil in an electric tea pot is made of nichrome wire with a radius of 0.225 mm. If the…

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

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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: ine the resistance of a conductor 0.119m long, with a uniform diameter of 1.19 cm and having a…

A: Given Length of conductor, Lo=0.119 mDiameter of conductor, d=1.19 cmResistivity, ρ=0.319+10-4 L2 Ω…

Q: An electric heating element to dissipate 450 watts on 250 V mains is to be made from nichrome ribbon…

A: Given data:  Power (P) = 450 W Voltage (V) = 250 V Width = 1 mm Thickness = 0.05 mm Resistivity of…

Q: The temperature coefficient of a certain conducting material is 4.52 x 10-4 (°C)-1. (a) At what…

A: Thermal coefficient of temperature (alpha) = 4.52 x 10-4

Q: The resistance R of a copper wire at temperature T = 25 °C is R = 112. Estimate the resistance at T…

A: The resistance R of a copper wire with a temperature T in C  is R(T).Then, given that R(25)=11 and…

Q: (a) A 35.5-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of…

A: Given Data The length of copper wire is:L=35.5 m The initial temperature is:To=20°C The heated…

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 24 V potential difference is supplied across a 15 N resistor. Calculate the current flowing…

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Q: A 35.1-m length of copper wire at 20.0°C has a radius of 0.29 mm. If a potential difference of 8.00…

A: Given: Length of the wire, L = 35.1 mInitial temperature, T0 = 20°CRadius, r = 0.29 mm = 0.29×10-3…

Q: Given the temperature coefficient of resistivity of a certain wire to be 3.1 x10−3 (°C)−1.By what…

A: Given temperature coefficient of resistivity , α=3.1 x10−3 (°C)−1 Let   T1 =20.0°C        T2 = 79.48…

Q: The heating coil in a hair dryer is made of nichrome wire with a radius of 0.275 mm. If the coil…

A: Given Data :Radius r = 0.275 mmCurrent I = 8.65 APotential difference V = 120 VResisitivity of…

Q: A 500-W heating coil designed to operate from 110 V ismade of Nichrome wire 0.500 mm in diameter.(a)…

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

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Q: A small heater is used to keep critical components from getting too cold in space. The device yields…

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Q: A (b) If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is…

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Q: Consider the following. (a) Find the current through the resistor in the figure above. (Take R…

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Q: A heating element is made by maintaining a potential difference of 89.0 V across the length of a…

A: Given that; Potential difference, V=89 V Cross section, A=4.96×10-6m2 Resistivity, ρ=5×10-7Ωm a) We…

Q: A long cylindrical conductor is constructed whose coefficient of resistivity at a temperature of…

A: Given, , Resistivity,                                Temperature coefficient of resistance are .

Q: A platinum wire with resistance 1.0 N at 20 °C is immersed in liquid nitrogen at -195.9 °C. If the…

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

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

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Q: Nichrome wire of cross- sectional radius 0.545 mm is to be used in winding a heating coil. If the…

A: Given data  The radius is r=0.545 mm The current is Io=6.30 A The voltage is Vo=120 V The…

Q: A heating element is made by maintaining a potential difference of 125.0 V across the length of a…

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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.