c. A length of wire is cut in half and the two lengths are wrapped together side by side to make a thicker wire. How does the resistance of this new combination compare to the resistance of the original wire?
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- During the manufacture of wire, the cross section can be decreased, and the length increased, by pulling the wire through a hole (in what is called a die) that is smaller than the wire’s initial cross-section. a. If the wire is stretched to 4 times its original length, by what factor does its resistance increase? fR = b. If the wire is stretched to 6 times its original length, by what factor does its resistance increase? fR =A metal wire of resistance R is cut into two pieces of equal length. The two pieces are connected together side by side.What is the resistance of the two connected wires?A. R/4 B. R/2 C. R D. 2R E. 4RWhen unequal resistors are connected in parallel in a circuit, a the same current always runs through each resistor. b the potential drop is always the same across each resistor. c the largest resistance has the largest current through it. d the power generated in each resistor is the same.
- Kate has an iron wire connected across the terminals of a battery. When her circuit is at 20 degrees celcius , a current of 9.2 mA flows through her wire. When the circuit is placed somewhere else the current becomes 8mA. If the iron has a temp coefficient of resistivity of 5x10^-3(degrees celcius)^-1 , the temp of the new environment in degrees celcius is? a. -46 b. -6.1 c. 10 d. 30 e. 50The tungsten filament of a light bulb uses 60 W when connected to a 120 V power line. When the bulb is cold, its resistance is 24 Ω. a. What is the resistance of the bulb when it is hot? b. What current flows through the bulb when it is cold? c. What current flows through the bulb when it is hot?A cylindrical metallic wire with a resistance of 12 Ω has a cross-sectional area of 4.0 mm2 and a length of 2.0 m. What is the resistance of another wire made of the same metal that has three times the cross-sectional area and twice the length of the first wire? a. 4.0 Ω b. 5.0 Ω c. 7.0 Ω d. 8.0 Ω e. 6.0 Ω
- You have a 100 meter long hollow square copper wire that has a side length of 5mm. The diameter of the cylindrical interior is 3.5 mm. If copper had a resistivity of (1.7x10^(-8)Ωm, what is the resistance of the wire? The units for the options are Ω. a.0.022 b. 0.068 c.0.11 d. 0.18 E.0.24Part A What is the resistance of A 1.9-m-long gold wire that is 0.50 mm in diameter? Express your answer in ohms. Φαν| A Η Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B A 50-Cm-long piece of carbon with a 2.0 mm x 2.0 mm square cross section? Express your answer in ohms. Submit Request Answer