What is the resistance (in Ω) of a 35.0 m long piece of 21 gauge copper wire having a 0.723 mm diameter
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What is the resistance (in Ω) of a 35.0 m long piece of 21 gauge copper wire having a 0.723 mm diameter?
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- A metal wire has a length of 55.0 m and a diameter of 0.550 mm. The entire length of wire has a resistance of 1.80 resistivity (in Q : m) of the metal. Ω. mA metal wire has a length of 45.0 m and a diameter of 0.700 mm. The entire length of wire has a resistance of 2.40 Ω. Find the resistivity (in Ω · m) of the metal. Ω· mThe label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage. The radio has a 3.2 0 resistance. Hint a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if a single nicad cell is used? The voltage supplied to the radio is b. With an alkaline cell, having an internal resistance of 0.2 , what is the voltage supplied to the radio, if a single alkaline cell is used? The voltage supplied to the radio is The radio's effective resistance is lowered when its volume is turned up. At what value of radio's resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell? Hint for (c) When the radio has an effective resistance of voltage can be obtained with a nicad cell. V. V. 2 or smaller, a greater
- A copper wire has a resistance of 0.475 at 20.0°C, and an iron wire has a resistance of 0.495 at the same temperature. At what temperature (in °C) are their resistances equal? Enter a number. °℃What is the resistance of a 2.54-cm-diameter rod of pure silicon that is 20.0 cm long. What current flows through the rod when 1.00 × 103V is applied to it?The figure below shows five resistors and two batteries connected in a circuit. What are the currents I, I2, and Ig? (Consider the following values: R₁ - 1.200, R₂ =2.18 Q, Rg-3.13 Q, R44.100, Rs 6.20 0. Due to the nature of this problem, do not use rounded intermediate values in your calculations including answers submitted in WebAssign. Indicate the direction with the sign of your answer.) Need Help? 12.0 V 9.00 V Read It R₂ www R₁
- A steel wire, of length L and diameter D, has a resistance of 100 . What current would flow through a silver wire of the same diameter and the same length if a 13.0 V potential difference were applied across its length? Express your answer in amperes. I = ΠΫΠΙ ΑΣΦ ! You have already submitted this an No credit lost. Try again. Submit ? Previous Answers Request Answer A Enter a new answer.N32.(a) Find the equivalent resistance of the circuit in Figure P18.8. (R1 = 4.00 2, R2 = 15.0 2) (b) If the total power supplied to the circuit is 2.00 W, find the emf of the battery. R2 4.00 2 5.00 N R, R, Figure P18.8