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- Conduc-Thor-s. Thor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor Length | Cross-Section Side Length Alpha L Beta L/2 s/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, Ia and IB, through Alpha and Beta? O A. Ia = 8IB O B. 8Ia = Ig O. Ia = 4I8 O D. 4Ig = Ig Clear my choiceAluminium is a good conductor of electricity. A 100 m aluminium wire of diameter 2.25 mm is to be used in domestic electrical wiring. If a voltage of 250V and a current of 13 amps are needed, answer the following i. What is the conductivity of the aluminium wire?Given the following: Material: -copper Coefficient a (1/°C): -3.9x10^-3 Material: Constantan (Cu, Ni, alloy) Coefficient a(1/°C): -0.002x10 Suppose you want to double a copper‘s wires resistance. To what temperature, in degrees Celsius, must you raise it if it is originally at 18°C, neglected any changes and dimensions?
- A conducting cylinder has length 36 mm and radius 17 mm. The conductor is then reshaped into a smaller cylinder, a quarter of the original length, and half that of the original diameter. The conductivity of the material is 6x107/Ω.m. Enter your answer in scientific notation with 2 significant figures. Please calculate the resistance for the reshaped conductorAn electric device draws 6.10 AA at 240 VV. If the voltage drops by 25 %, what will be current, assuming nothing else changes? Express your answer to two significant figures and include the appropriate units. I final= If the resistance of the device were reduced by 25 %, what current would be drawn at 240 VV? Express your answer to two significant figures and include the appropriate units. I final=1.3x1016 electrons flow through a cross section of silver wire in 310 us with a drift speed of 7.2x10-4 m/s. ▼ Part A What is the diameter of the wire? Express your answer to two significant figures and include the appropriate units. D = Submit μÅ Value Request Answer Ć Units ?
- A 1.5-m-long wire is made of a metal with the same electron density as copper. The wire is connected across the terminals of a 9.0 V battery. ་ Part A What conductivity would the metal need for the drift velocity of electrons in the wire to be 45 mph? Express your answer with the appropriate units. ΤΟ ΑΣΦ σπ xa Хь b √x √x ? א1 x x ||X| X.10n Submit Previous Answers Request Answer × Incorrect; Try Again Part B By what factor is this larger than the conductivity of copper? σ/σ copper = ΜΕ ΑΣΦ Submit Request Answer Provide Feedback ☑ ? Ω-1 m-1(c) Aluminium is a good conductor of electricity. A 100 m aluminium wire of diameter 2.25 mm is to be used in domestic electrical wiring. If a voltage of 250V and a current of 13 amps are needed, answer the following i. What is the conductivity of the aluminium wire? ii. Give two reasons why aluminium wire is not used in domestic wiring in Zambia? iii. Give three applications of pure aluminium.Resistance in metals increases with increasing temperature according to the equation, ρ(T) = ρo(1 + α(T - To)) where α is the temperature coefficient of resistivity and ρo is the resistivity at temperature To. For a particular wire α = 9.5 × 10-3 1/°C and the resistivity is ρo = 4.5 × 10-7 Ω⋅m at To = 154 °C. a). Input an expression for the temperature T2 at which the resistance of a wire will be twice as high as at T0. b). If the wire is L = 1 m long with a radius of r = 1 cm, what is its resistance R, in Ω, at 2To?
- A student woants to identify the Resistivity of a conducting wire of unknown material. Resistivity is a property of a material that quantifies how strongly it conducts electric current, and it is formulated as, of p= R4 where R is the Resistance (ohms), A cross-sectional area (meters-squared) and I is the length (meters) of the wire. The student runs an experiment on a cylindrical wire of a length l of 2 centimeters and the cross- sectional area A of the wire is 6.1 centimeters-squared. The measurements of the Current is as below Dataset Voltage (Applied, Volts) Current (Measured, Amperes)Q1/ A piece of resistance wire, 15.6 m long and of cross-sectional area 12 mm? at temperature of 0°C, passes a current of 7.9 A when connected to d.c. supply at 240 V. Calculate (a) resistivity of the wire, (b) the current which will flow when the temperature rises to 55 °C. The temperature coefficient of the resistance wire is 0.00029 / °C.The resistance of the tungsten filament of an incandescent light bulb at 22 degC is 34 Ohms. If the light bulb is connected to a voltage of 126 V a current of 0.36 A flows through the filament. What will be the temperature of the light bulb filament under working conditions? The temperature coefficient of resistance of tungsten is 4.6E-3 1/degC. Your answer must be in degC, other scales are not accepted.