A 1.30 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0∘C) the ammeter reads 18.8 A, while at 92.0∘C it reads 16.6 A. You can ignore any thermal expansion of the rod. (A) Find the resistivity for the material of the rod at 20∘C Express your answer with the appropriate units. (B) Find the temperature coefficient of resistivity at 20∘C for the material of the rod. Express your answer in inverse degrees Celsius.

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

A: (a) Resistivityof rod  at 20° = 1.05× 10^-5ohm /m (b) Temperature coefficient of resistivity at 20°C…

Q: The earth's surface has a negative surface charge density of 10-9 C m². The potential difference of…

A:

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…

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Q: Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0,5…

A: The given data are: V=4.5 Vd=0.5 mm=0.0005 mP=20 Wρ=1.7×10-8 Ω.m

Q: What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x…

A: Given: The diameter of the wire is 2.45 cm. The length of the wire is 21.5 cm. The potential…

Q: A cylindrical resistor of radius 3.9 mm and length 2.0 cm is made of material that has a resistivity…

A:

Q: A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a…

A: Given data:  Length (L) = 2.0 m Cross section area (A) = 2.0 mm × 2.0 mm Resistivity (ρ) = 6.0×10-8…

Q: Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 1…

A: Given-Potential V=4.5 VDiameter d=1 mm=1×10-3mRadius r=d2=1×10-32=0.5×10-3mResistivity of the copper…

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

A:

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Q: A copper (resistivity = 1.72 EXP-8 Ω.m) conductor with a square cross section, 1.0 mm on a side is…

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

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A: part a and b are solved so with the help of this we will solve part c .

Q: In an experiment, the current through a wire is 0.200 A and the voltage across the wire is 0.800 V.…

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A: Given: The radius of the wire is 2.19 cm. The length of the wire is 2.6 m. The resistivity of the…

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

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Q: A uniform cross-section of silver has a resistivity of 1.54 x 10-8 2 m at room temperature. For an…

A: Given data:  Resistivity of silver (ρ) = 1.54 × 10-8 Ω.m Electric field (E) = 1 Volt/cm Density of…

Q: Consider a portable electric blanket that runs on a 4.5 V battery. If you use copper wire with a 0.5…

A: Given that:- Diameter of wire=0.5mm Resistivity of copper wire=1.7×10^-8 ohm×m

Q: A 22-gauge copper wire has a radius of 0.645 mm, is 5.00 m long, and has a resistivity r = 1.72 ´…

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Q: A spool of copper wire 290 m long and with a diameter of 0.360 mm is at 20.0°C. For copper, the…

A: The wire's resistivity is, ρ=1.7×10-8 Ω The wire's length is, L=290 m The radius of wire is, r=0.360…

Q: Consider a copper wire with a diameter of 2.55 mm. (a) What is the drift speed of the electrons in…

A: Diameter of copper wire d=2.55 mm (radius r=1.275 mm), current I=15 A, density of copper is 8.92…

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Q: Consider a copper wire with a diameter of 2.75 mm. A. What is the drift speed of the electrons in…

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Q: A rod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a…

A: Given data: The length of the rod, l=2.0 m. The side length of the square cross section of the rod,…

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

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Q: Consider a carbon rod resistor that has a uniform cross-sectional area of 5.00 mm-. When a potential…

A: The resistance of a material is equal to the resistivity and length of the conductor and inversely…

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 tungsten wire has a radius of 0.097 mm and is heated from 20.0 to 1383 oC. The temperature…

A: radius of tungsten wire , r = 0.097 mm = 0.097 x 10-3 m   Initial temperature , T1 = 20 °C Final…

Q: A coaxial resistor of a length L22 am-long consists of two concentric cylinders. The inner cylinder…

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Q: use a 0.50-mmmm-diameter copper wire as the heating element, how long should the wire be if you want…

A: We know that the Formula of the resistance in terms of the resistivity is given as  R = ρLA where R…

Q: A cylindrical resistor of radius 3.0 mm and a length of 3.0 cm has a resistivity of 2.6 x 10-3 Ωm.…

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Q: A certain laboratory experiment requires an aluminum wire of length of 22.0 m and a resistance of…

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Q: A 500-W heating coil designed to operate from 110 V is made of Nichrome wire 0.500 mm in diameter.…

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Q: What current flows through a 2.45-cm-diameter rod of pure silicon that is 21.5 cm long, when 1.00 x…

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Q: The instructions for an electric lawn mower suggest that a 20-gauge extension cord can be used for…

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Q: What current flows through a 2.54-cm-diameter rod of pure silicon that is 20.0 cm long, when 1.00 X…

A: Given Data: The diameter of the rod is, d = 2.54 cm. The length of the rod is, L = 20 cm. The…

Q: Consider a resistor made from a hollow cylinder of carbon as shown below. The inner radius of the…

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Q: A 500-W heating coil designed to operate from 100 V is made of Nichrome wire 0.500 mm in diameter.…

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Q: An aluminum wire (ρ = 2.82x10-8Ωm at 20 °C and α = 3.9x10-3°C-1)with a diameter of 0.085 mm has a…

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Q: A spool of copper wire 290 m long and with a diameter of 0.440 mm is at 20.0°C. For copper, the…

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Q: A lab technician is studying the effect of temperature on the resistance of a current carrying wire.…

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Q: The Iceberg Kid, infamous for imposing a deep freeze on whoever disagrees with him, discovers that…

A: Given: The thermal energy is 185 J. The time interval is 6.19 s. The operating voltage is 12.0 V.

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.