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Put these materials in order from lowest resistivity to highest based on the measurements in this experiment.
Nichrome
Copper
Aluminum
Brass
Stainless steel
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- Caleulate the number of donor atoms'm' of n-type material having resistivity of 0.8 2m, the mobility of electrons is 0.25 m V-s 3.125 x 10 ^ 20 8.33x10 ^ 19 10 ^ 20Class number: Schedule: Date: 1. A wire 50 m long and 1 mm in radius is connected to a battery 9.11 V with a current of 36 A. Takıng the temperature at 20°C and using the table of resistivities for some materials above, determine the material of the wire. (Copper) An electric ho2) Resistivity is a property of a particular material and can be used to calculate the resistance of a sample. a) Provide an equation for calculating the resistivity of a material. b) Calculate the resistance of 50m roll of copper wire which has a cross sectional area of 5mm^2 if the resistivity of copper is 1.72 x 10^-8 ohm metres.
- An iron wire has a length of 1.50 m and a cross sectional area of 0.240 mm2. If the resistivity of iron is 10.0 x 10-8 0· m and a potential difference of 0.800 V is maintained across its length, determine the current in the wire (in A). 3.6e-2 Can you use Ohm's law to express the current in the wire in terms of the resistance of the wire and the potential difference across the length of the wire? How is the resistance of the wire related to its resistivity, length, and cross-sectional area? AAn 80-2 resistor and a 20-2 resistor are connected in parallel, and then this combination is connected in series with a 32- resistor and a 24-V battery. An ammeter to measure the current through the 80- 2, and a voltmeter to measure the potential difference across the 32 Q is needed. TOraw the cireit 2 K he total 1e meter astanco of the cire What is the difference -potential across the 32-Q resistor? Across the 80-2 resistor? = 5. What is a fuse and how does it protect a circuit or device to which it is connected? 6. Show using diagrams how using only 2 Q resistors the following resistances can be made: ( a) 0.5 Ω (b) 1 Ω, ( c )3 Ω; ( d ) 5 Ω. 7. Three wires in a circuit meet in a common point. The currents flowing in two of them are 2 A and 3 A respectively. What are the possible values of the current in the third wire? Explain your answer [drawings would help]. D koksch_b201pdt Show AN MacBook Air esc 288 10 F11 F12 %23 & 2 4. 6. 8 9 11 delete Q W R T Y tab ps lock S D G H J. 11 K L…A new material is found to be superconducting below 77 K. How much resistance will a 75 mm long sample of this material have if it is at a temperature of 69.3 K while connected to a 6.4 V AC-power supply? R = How much thermal energy will it generate?Thermal energy generated =
- What would happen to the temperature and the resistivity value of a wire if the current were very large?Do you think the resistor you measured are generally within tolerance? What evidence support your answer ?When a potential difference is applied to a certain copper wire, a current of 7/5 A passes throughthe wire. If the wire was removed from the circuit and replaced with a copper wire of twice thecross-sectional area, what current would flow through the new wire? Assume the wires areidentical in all other aspects
- 2. a) The resistivity of copper is 1.7241 x 10-8 (22-m) at 20°C. What is the conductivity of copper at 27°C in units of (0-m)-¹ and (0-cm)-1 if the temperature coefficient of resistivity of copper is 3.9 x 10-³/°C? b) Explain the change of conductivity with temperature. 2 For carbon: - 35 x 10-50-m and g --50 x 10-4 1°CA brine sample recovered from depth of 8400 ft has a measured resistivity of 0.28 ohm-m at temperature of 68F. What is the resistivity of this brine in the reservoir?tus or W tus (15%) Problem 1: Consider a wire made of copper with conductivity 6.0 x 107 02¹m¹, which has a circular cross-section of radius 0.17 mm. In a particular circuit, this wire carries a current of 2.5 A. Fequiere, Vanessa-vanessa fequiere@uconn.edu Completed Completed @theexpectta.com-Arackmg 10:2ZEN BALIMISTADA so may result in terminaisou your Expen TNI A 50% Part (a) What is the electric field, in volts per meter, inside this wire? E=1 sin() cotan() atan() cosh() cos() asin() acotan() tanh() Degrees Submit tan() acos() sinh() cotanh() Radians Hint E ( + VO Feedback 7 8 9 4 5 6 1 2 3 131 0 I give up! Feedback: 0% deduction per feedback. olanens sharing website is strictly forbidden. Doing Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining: S (0% per attempt) detailed view Hints: 2% deduction per hint. Hints remaining: 1 50% Part (b) If we replace this wire with a gold one of the same size, with conductivity 4.1 x 1072 m, what will the electric field in…
