3. Two cylindrical bars, each with diameter of 2.30 cm, are welded together end to end. One of the original bars is copper and is 0.350 m long. The other bar is iron and is 0.175 m long. What is the resistance between the ends of the welded bar at 20°C?(The resistivity of copper and iron can be obtained from the textbook)

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: A length of aluminum wire has a resistance of 14.00 at 32.0°C. When the wire is warmed in an oven…

A:

Q: pper wire has a resistance of 0.525 N at 20.0°C, and an iron wire has a resistance of 0.560 N at the…

A:

Q: 1. A cylindrical rod has a radius a and length L, and is made of a ma a resistivity that varies…

A: GivenRadius =aLength=Lρ=ρ0 ebx

Q: 4. The electrical resistance of human body in about 50 ko on average. If a person inadvertently…

A: Internal resistance (r)=2000 ohmsElectrical resistance of human body=50000 ohmsPower supply=20000 V

Q: To what temperature must you raise a gold wire (c = 0.0034), originally at 20.0°C, to double its…

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

A: Given., Thermal energy is generated W = 177 J For time  t = 7.69 Voltage V = 12 V    We know the…

Q: 10. An aluminum wire (resistivity at 20°C of 2.65x10-8 2m, temperature coefficient of 0.00429/°C) is…

A:

Q: 1.70 mm cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a…

A:

Q: . A certain lightbulb has a tungsten filament with a resistance of 19.0 N when at 20.0°C and 140 N…

A:

Q: A copper wire with a circular cross-section has a mass of 1.20 g and a resistance of 0.590 2. At…

A: Given: Mass of wire is m=1.20 g Resistance of wire is R=0.590 Ω At temperature T=20°C, resistivity…

Q: A copper wire has a length of 34.0 m and a resistance of 5.00 Q at 20.0°c. Assuming a circular…

A: Given- Length of copper wire l=34 m Resistance R=5Ω The resistivity of copper ρ=1.7×10-8 Ω-m

Q: 3.  Pure water has very few ions (about 1.20 × 1014 ions per cubic centimeter), giving it a high…

A:

Q: Problem 2: Suppose you have a 2.2 cm diameter rod of pure silicon that is 22 cm long. > A What…

A: Given: The length of the wire is 22 cm. The diameter of the wire is 2.2 cm. The resistivity of the…

Q: 11. A typical car seat heater produces 10 W of heat using a 0.25 mm diameter steel wire connected to…

A: The resistance is,

Q: 13. A very long straight, cylindrical wire lying along the x axis has a diameter of 0.250 mm and is…

A:

Q: 3. Look up tabulated conductivities (or resistivities) of copper, silver, and aluminum at 20 °C and…

A: The resistance for a given length of a conducting wire is given in terms of its resistivity as…

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.