The heating element of an electric toaster is typically made of nichrome wire (an alloy of nickel and chromium). As a current passes through the wire, the wire heats up, thus toasting the toast. Estimate the overall resistance of a heating element which is 245 cm long with a diameter of 0.5 mm. The coefficient of resistivity for nichrome is 1.1*10-6 Ω•m. (Hint: Treat the heating element as a long straight cylinder). a) 1.37 Ω

Q: A copper wire has a resistance of 0.480 Ω at 20.0°C, and an iron wire has a resistance of 0.519 Ω at…

A: We have given Resistance of copper wire (Rc)=0.480 ohmTemperature (T)=20°CResistance of Iron  wire…

Q: Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.15…

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Q: At room temperature (27.0 °C) the resistance of a heating element is 100 Ω. What is the temperature…

A: Given,

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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 certain light bulb has a tungsten filament with a resistance of 13.0 Ω when cold ( 20.0°C ) and…

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Q: Using Kirchhoff's rules, find the following. (&₁ = 71.0 V, ₂ = 61.0 V, and 3 = b - a E₁ 1 IR2 IR3…

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Q: The relatively high resistivity of dry skin, about 1 x 106 Ω • m, can safely limit the flow of…

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Q: A piece of wire has resistance of 1.25 2. The wire is made of a material with resistivity 8.2x10-7…

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Q: You have four homogeneous wires made of the same material. Each wire has a diameter of 3 mm and a…

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Q: Suppose that the resistance between the walls of a biological cell is 5.1 × 109 Ω. (a) What is the…

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Q: Suppose that the resistance between the walls of a biological cell is 5.9 × 109 Ω. (a) What is the…

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Q: There is a potential difference of 1.6 V between the ends of a 10 cm long graphite rod that has a…

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Q: There is a potential difference of 1.3 V between the ends of a 10 cm long graphite rod that has a…

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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 resistivity of gold is 2.44 x 10-82-m at a temperature of 20°C. A gold wire, 1.8 mm in diameter…

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Q: A common flashlight bulb is rated at 0.25 A and 2.6 V (the values of the current and voltage under…

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Q: nce of 0.49 Ω at 20.0°C, and an iron wire has a resistance of 0.57 Ω at the same temperature.  a)…

A: We know that we have given that the A copper wire has a resistance of 0.49 Ω at 20.0°C, and an iron…

Q: A 2 m long gauge 14 copper wire (diameter 1.624 mm, resistivity 1.72 × 10-8 Ωm) replaces a similar 2…

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Q: Resistance

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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.