Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (Table of resistivities) (a) Calculate the rate at which internal energy is produced in 1.40 m of 12-gauge copper wire carrying 20.0 A. W (b) Repeat the calculation for a 12-gauge aluminum wire. W (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.

Q: For safety reasons, electrical codes have been established that limit the amount of current a wire…

A:

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: Given:  diameter of the wire, d = 12 gauge=0.205 cm= 0.00205 m length of the wire, L = 1.90 m…

Q: 1. Immersion heaters are placed into liquids to warm them up. If 250 g of water in a cup is heated…

A: Given data  Mass m = 250 g Initial temperature ti = 15°c Final Temperature tf = 97°c Time T = 5min =…

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: diameter of wire (d) = 0.205 cm Area of cross section of wire (A) = π×(d24) = π×([0.00205]24) =…

Q: Lesidential building codes typically require the use of 12-gauge copper Such circuits carry currents…

A: Given That: The length of copper and aluminium wire is: l=2.45m The current in the wire is I=20A…

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: 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: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

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Q: (a) A 33.9-m length of copper wire at 20.0°C has a radius of 0.27 mm. If a potential difference of…

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Q: If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost (a) To…

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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: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: Given Data The diameter of the wire is d = 0.205 cm The current carried by the wire is I = 20 A…

Q: A wire is made from a material having a temperature coefficient of resistivity of 0.00125 (°C)". In…

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Q: If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost? (a) To…

A:

Q: sidential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A:

Q: An 18 gauge copper wire (the size usually used for lamp cords), with a diameter of 1.02 mm, carries…

A:

Q: An engineering intern is studying the effect of temperature on the resistance of a current carrying…

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Q: In the United States, the National ElectricCode sets standards for maximum safe currents in…

A: Let the safe current be I, the resistance of the wire be R, and the length of the wire be L. a) For…

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A:

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: diameter (d) = 0.205 cm radius = 0.1025 cm Area (A) = π×(0.001025)2 = 3.3×10-6 m2

Q: The copper windings of a motor have a resistance of 46 Ω at 20oC when the motor is idle. After the…

A: Initial resistance of copper windings (r) = 46 ohm initial temperature of the copper windings (t) =…

Q: Calculate the drift velocity of electrons when a current of 1.5 A flows in a copper wire of…

A: Given data:  Current (I) = 1.5 A Cross-sectional area (A) = 5.0 mm2 = 5.0×10-6 m2 Electron density…

Q: (a) Of what material is a wire made, if it is 20.0 m long with a 0.150 mm diameter and has a…

A: Given data:  Length (L) = 20.0 m Diameter (d) = 0.150 mm = 0.150 × 10-3 m Initial Resistance (Ro) =…

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: Given information: Current carried by the copper wire (I) = 20 A The diameter of the wire (d) =…

Q: Suppose you wish to fabricate a uniform wire from 1.30 g of copper. The wire is to have a resistance…

A: The expression for the area of the wire,

Q: Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for…

A: Here, the power means rate of consumption of energy.  Power = V * I

Q: A gold wire 4.0 mm in diameter and 1.5 m in length is to be used in a test circuit. (a) Calculate…

A: The resistance is given by  R = ρLA where, L is the length and A is the area.

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.