Problem #5
A communications cable is 2.00 km long and consists of two parallel wires separated by an insulator. At some point in the wire, the insulation has been crushed and the 2 wires are able to touch. You have the job of finding where the break is in the insulation occurs. You go to one end of the line and connect a 9.00 V battery to one wire, and the other terminal of the battery to one terminal of an ammeter. When the other terminal of the ammeter is connected to the other wire, the ammeter shows the current is 1.05 A. You then disconnect everything and repeat the process at the other end of the cable, where you find a current of .257 A. Where in the cable are the wires touching?
Problem #5 A communications cable is 2.00 km long and consists of two parallel wires separated...
An underground cable 8.3 km long extends east to west and consists of two parallel wires, each of which has resistance 14 2/km. An electrical short develops at distance x from the west end when a conducting path of resistance R connects the wires (see the figure). The resistance of the wires and the short is 170 2 when measured from the east end and 110 when measured from the west end. What are (a) x and (b) R? Conducting...
3) Two thin conducting wires are used to connect very large conducting plates to opposite poles of a battery. Chemical reactions within the battery produce an emf E that "pushes" one electr after another onto the wire connected to the negative terminal of the battery, and "pulls" one electron after another from the wire connected to the positive terminal of the battery on electrons pulled in electrons battery pashed out conducting plate a) Given that positive charges repel each other...
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5...
!? Verify Kirchhoff’s Current law (I) in = (I) out for
junction point “X” in the circuit
point 560 Ω resistor 1000 Ω resistor 4.5 . 1 |ー オー1 ered battery box1 -T 10000 Ω resistor 17 black 1 Is switch (closed for measurements only) +1 To measure each current, the wire it is flowing through must be "cut" (disconnected) and the ammeter inserted in series. COM Do not place the ammeter across a component, as this may damage the...
1. There are two straight and parallel wires, separated by a distance D. In the first the current is i, while in the others it is 2i; both in the same sense. At what distance from the first wire will the magnetic field between the wires be zero? 2. A cable that is 5 meters above the ground has a current of 100 A. Determine the magnetic field at ground level. 3. An airplane flies at 200m / s in...
Exercise 1 Electric Fields In this exercise, you will use a digital multimeter to collect voltage data to graph electric fields. Procedure Place the sheet of graph paper on a table and center the clear tray over the grid. Attach the end of each jumper cable to a metal nut by clamping the free alligator clip onto it as shown in Figure 4. The figure is a photo of an alligator clip attached to a metal nut. It is attached...
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EXPERIMENT: 26 ELECTROCHEMISTRY: GALVANIC AND ELECTROLYTIC CELLS Materials Required : 50 mL beakers (2) test tubes sandpaper glass U-tube cotton voltmeter 9.0 V battery connecting wires with alligator clips (2) thermometer iron nail paper clips (2) copper wire magnesium ribbon magnesium sulfate (MgSO) copper sulfate pentahydrate (CuSO, 5H,O) sodium chloride (NaCI) saturated sodium chloride (NaCI)solution phenolphthalein indicator SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY. Purpose of Experiment: Oxidation-reduction reactions will be performed and...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
pleas help me in this do any question you know using National
Electrical Code 2011
Applied Electricity NEC worksheet t hree Copper conductors with THHN insulation run in Electrical A branch-circuit Consther conductors. The conductor terminations are rated for a maximum ure in the area of this installation is not expected to exceed 30C size 8 AWG, the maximum ampacity of the conductors If the conductors for this circuit are permitted A 40 amperes. B. 50 amperes. to be used...
Write down your analysis of this case on factors like the interests involved, context and power PACIFIC OIL COMPANY (A)* "Look, you asked for my advice, and I gave it to you," Frank Kelsey said. "If I were you, I wouldn't make any more concessions! I really don't think you ought to agree to their last demand! But you're the one who has to live with the contract, not me!" Static on the transatlantic telephone connection obscured Jean Fontaine's reply....