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a) Using Kirchhoff's rules find the currents l1 l2 l3
b) Explain shortly with your own words; resistivity,
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- Material=Nickel Resistivity=6.99 x 10^(-8) Ω.m a) Calculate the conductivity of your material. Compare the conductivity of your material with conductivity of glass having a resistivity of 3.0 x 1010 Ω.m. b) Suppose that you have a cylinder that is made of your material with a length of l=20.0 cm and a cross- sectional area of A=4.00x10-4 m2. Calculate the resistance, R, of the cylinder. c) A 9.0-V battery is connected to the cylinder that is made of your material in part-b. Using Ohm’s law calculate the current passing through the material. (V=I*R I=?)d) Suppose that the cylinder in part-b is cut into four equal pieces. Calculate the resistance of one piece of cylinder (which has a length of one fourth of the original length l) and compare your result with the originalcylinder with length l.E) none of the above choices 17. For the graph shown in the figure, what physical quantity does the slope of the graph represent for ohmic material? Potential Current A) power B) resistivity C) 1/(resistivity) D) 1/(resistance) E) none of the above choices from A to E 12726 MacBook Air 000Material= Lead Resistivity (Ω.m) = 22 x 10- 8 a) Calculate the conductivity of your material. Compare the conductivity of your material with conductivity of glass having a resistivity of 3.0 x 1010 Ω.m. b) Suppose that you have a cylinder that is made of your material with a length of l=20.0 cm and a crosssectional area of A=4.00x10-4 m2 . Calculate the resistance, R, of the cylinder. c) A 9.0-V battery is connected to the cylinder that is made of your material in part-b. Using Ohm’s law calculate the current passing through the material. (V=I*R I=?) d) Suppose that the cylinder in part-b is cut into four equal pieces. Calculate the resistance of one piece of cylinder (which has a length of one fourth of the original length l) and compare your result with the original cylinder with length l.
- n=7*1028 e/m3 u = 8 *10-5 (m/s)(V/m) L = 1.7 m A = 9 * 10*8 m2 v= 14 v a) what is the electric field in the wire? b) using the Ohms law what is the wire resistance R? c) find the resistivity, p, of the wire?Number 12 copper wire (diameter 0.08080 inch) used for electrical installations in homes. What is the voltage drop in 50 m of #12 copper wire if it carries a current of 6.0 A? How many electrons pass through the copper wire per second (e = 1.6 x 10-19 C)? (The resistivity of copper is 1.7 x 10-8 2-m.) %3DWhich of the following is an installation requirement for the grounding electrode conductor in a communications system? A. It must be run as straight as practicable. B. It must be, at minimum, 4 AWG. C. It must be solid or stranded aluminum. D. It must be isolated and covered.
- a) Find the equivalent resistance across the terminal cd. b) Draw the diagram in your script and then apply KVL and KCL to it. Write down the equations accordingly and then Find the value of the current passing through resistor R3. c) Calculate the potential difference across R4 resistor.Consider three spools of wire of the exact same material. Spool 1 and 2 have the same cross- sectional area while Spool 3 is the largest of the three. In addition, Spool 1 has the longest length of the three. Which of the spools of wire has the largest resistivity? A. None of the above B. All have same resistivity C. Spool 3 D. Spool 2 E. Spool 1A 2 0 resistor, a 10 N resistor, and a 15 N resistor are connected in parallel across a 12 V battery. Determine the equivalent resistance for the circuit. Answer in units of N. 026 (part 2 of 2) . b) Determine the current in the circuit. Answer in units of A.
- 1. A hollow cylinder of length L, inner radius R1 , and radius R3 is filled with two different materials. From R1 to R2, the space is filled with a material of resistivity p1 . From R2 to R3 , the space is filled with material of resistivity p2 . a) Derive an equation for the resistance of this structure as current flows from R1 to R3 (ALONG the radial direction, NOT along the length). Ignore edge effects. b) If the total voltage across the object is Vo, find an expression for the current density along the objects ( i.e. find J(r)). Take V= Vo at R1 and V=0 at R35. How many free electrons are there in a rectangular block of a conductor whose dimension is 8 m by 4 m by 3 m? The electrons of this conductor have a drift velocity of 4 m/s when a 9.6 A of current is applied thru a cross-sectional area of 0.005 m?. Use electronic charge of 1.6 x 10-19 coulomb per electron. Express your answer in scientific notation whose unit is electrons per cubic meter.sics2 - Mr.Khalil .. A total of 2.0 x 1013 electrons pass a given point in a wire in 15 s. What is the current in the wire? ( ge = 1.6x10-19 C) Select one: O a. 1.3 µA O b. 1.3 A O C. 3.2 UA O d.0.21 µA Clear my choice Next page page physics