The heating element of an electric toaster is typically made of nichrome wire (an alloy of nickel and chromium). As current passes through the wires, the wires heat up, thus toasting the toast. Estimate the overall resistance of a heating element which is 220 cm long and consists of nichrome wire with a diameter of 0.56 mm. The resistivity of nichrome is 110x10-8 Ω•m.

Q: 15. A 2.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a…

A: Solution:  Voltage across the rod, V = 18.0 V  Length of the rod, L = 2.50 m = 250 cm  Diameter, d…

Q: When all the ion channels in a cell membrane are closed, the resistivity is very high. However if…

A:

Q: Charges can move across the cell membrane, so it is not a perfect insulator; the cell membrane has a…

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Q: Resistance depends on the size and shape of a conductor. We expect a long wire to have higher…

A: Given data:  Resistivity (ρ) = 12.08×10-8 Ω.m Length (L) = 14.22 mm = 14.22×10-3 m Diameter (d) =…

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

A: Given,

Q: Calculate the ratio of the resistance of 15.0 m of aluminum wire 2.3 mm in diameter, to 30.0 m of…

A: Given: Length of aluminum wire, La=15 m            Diameter of aluminum wire, d=2.3 mm…

Q: What current flows through a 2.90 cm diameter rod of pure silicon that is 15.5 cm long, when 1000 V…

A: Solution:   Given Values,   The radius of the rod (r)=d2=2.90 cm2=0.0145 m Length of the wire…

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

A: Consider the given data as below. Resistance of the filament, Ro=13.0 Ω Reference temperature,…

Q: A 1.50 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a…

A:

Q: A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 2 ℃, the…

A: The carbon resistor at a temperature T0=20C The resistance of the carbon resistor  R0=215 Ω…

Q: Assuming that you would want to make a uniform wire out of 5 grams of copper. If this wire is to…

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Q: What is the maximum power deliverable b a stack of 100 10YSZ cells to an optimum resistive load?…

A:

Q: At room temperature (27.0 °C) the resistance of a heating element is 100 2. What is the temperature…

A: Given that - room temperature Resistance at room temperature Resistance at increased temperature…

Q: A 5-meter-long conductor with diameter of 5mm is connected to a source and an external resistance.…

A:

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

A:

Q: 15. A 2.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a…

A:

Q: Whale and Kanmuro are two islands located in the Chimera archipelago. These two are separated by a…

A: Given data: Distance of separation d =20 miles=32.1689 km Maximum power P =600 MW Voltage…

Q: Copper has a charge density of 8.5 x 102º electrons per m, and a resistivity of 1.7 × 10¬8 N·m. The…

A: In given problem resistivity of copper is = 1.7*10-8 ohm-meter length of wire (L) =1 meter…

Q: A copper wire has a resistance of 0.510 Ω at 20.0°C, and an iron wire has a resistance of 0.543 Ω at…

A: Resistance is directly proportional  to the temperature of a body. We will use the formula for the…

Q: A certain lightbulb has a tungsten filament with a resistance of 18.5 N when cold and 136 N when…

A:

Q: The temperature coefficient of resistivity for the metal gold is 0.0034 (C°)-1, and for tungsten it…

A: Given  αgold=0.0034 (C0)-1 αtungsten=0.0045 (C0)-1∆RRgold=7.9%

Q: person notices a mild shock if the current along a path through the thumb and index finger exceeds…

A: V = IR

Q: If the resistivity of a particular wire is 75.56x10-8 Ω⋅m, the wire is 48.16mm in length, and the…

A:

Q: esistance depends on the size and shape of a conductor. We expect a long wire to have higher…

A: Given: ρ=12.08*10-8 Ωl = 14.22 mr = 1.33 m

Q: A conductive rod with a length of 50 cm has an intensity of 2T with a velocity v. A vertical…

A: Length of rod, L=0.5m Magnetic field, B=2 T

Q: A toaster has a Nichrome (a-4.5x10* °C) heating element that has a resistance of Ro- 80 n at a…

A: Given data: Resistance  R0=80Ω Temperature T0 =20°C Coefficient of temperature α=4.5×10-4°C-1…

Q: A copper wire has a resistance of 0.505 Ω at 20.0°C, and an iron wire has a resistance of 0.537 Ω at…

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Q: A length of 120 cm from Aluminum cylinder with a cross-sectional area of 2.82 x 10 m2, the…

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Q: A copper wire has a resistance of 0.400 Ω at 20.0°C, and an iron wire has a resistance of 0.426 Ω at…

A: To determine: The temperature at which the resistance of the copper and iron will be equal   Given:…

Q: Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.35…

A:

Q: If the 0.130 mm diameter tungsten filament in a light bulb is to have a resistance of 0.100 Ω at…

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Q: A copper wire has a length of 38.0 m and a resistance of 4.10 Q at 20.0°C. Assuming a circular…

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Q: Q. m and 11.0 x 10 Q. m, determine the ratio of their lengths. Two wires have the same resistance…

A: Concept:- Resistance of a conductor having length L, cross-sectional area A  and resistivity ρ is…

Q: A thin copper wire with a diameter 2.5 mm is connected to a 1.2-V potential difference, a current of…

A: The voltage and current is given. So using ohm's law we can calculate the resistance by, V=IR R is…

Q: A coaxial cable of consists of two concentric cylindrical conductors. The region between the…

A: Given:- A coaxial cable consists of two concentric cylindrical conductors.   The radius of the inner…

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: A copper wire of radius a = 0.172 mm has an aluminum jacket of outer radius b = 0.231 mm. There is a…

A: Given: Radius of Copper,RC=0.172mm=0.172×10-3mOuter Radius of…

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.