HWI When a current of 2 A flows for 3 micro-seconds in a coper wire, estimate the number of electrons crossing the cross-section of the wire. Hint : With 2 A for 3 u Sec, charge transferred = 6 u-coulombs (Bombay University, 2000)
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- A 10-gauge copper wire has a cross-sectional area A=5.26mm2 and carries a current of I=5.00A . The adensity of copper is =89.50g/cm2 . One mole ofcopper atoms (6.021023atoms) has a mass ofapproximately 63.50 g. What is the magnitude of the drift velocity of the elections, assuming that each copper atom contributes one free electron to the current?What is the current through a cylindrical wire of radiusR = 0.1 mm if the current density is J=J0Rr where J0=32000Am2?The current density in a wire diameter 1-02 mm is 1.75x 105 Alm2. the number of free electrons per cubic meter of copper urrent in of drigt velacity copper of is 8.5x1028. Find the (a) the wire and (b) magnitude of Electrons in the wire.
- Rz RI Find the current through R, = 42 kQ and R, = 48 kN from the figure given. Here E, = 8 V and E, = 13 V Current through R Give your answer up to at least three significance digits. Current through R2 Give your answer up to at least three significance digits.= Two copper wires A and B have the same length and are connected across the same battery. If RB HINT (a) the ratio of their cross-sectional areas AB AA (b) the ratio of their resistivities PB PA (c) the ratio of the currents in each wire IB IA = 9R, determine the following.a) If the electron concentration increase along the x-axis of a conductor as shown in equation below: n= 3. 10"x + 2. 10"x + 1020 And D = 1.2 x 10-m/s. Find the diffusion current at x = 5mm?
- 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 choiceA current of one amp passes through a wire of cross sectional area 1 cm?. The number of electrons pass through that area per second is given by 6.24 x 10° s-1. What is the value of a? 22Whte down the e ons th solve, to find the current in eh branh rrounded by a very long conducting sleeve with dimensions shown on the figure below. ** -L5 uC/m, and the outer sleeve has a charge density of 2=-5 µC/m. A 2-meter extension cord is made out of copper wires witha 6 mm diameter. How thick should the wires in a 8-meter extension cord be if it is going to have the same resistance?
- Two copper wires A and B have the same length and are connected across the same battery. If R. = 4R, determine the following. HINT (a) the ratio of their cross-sectional areas Ag AA (b) the ratio of their resistivities PB PA (c) the ratio of the currents in each wire IB IAResistivity in metals increases with temperature according to the equation: ρ(T) = ρ0[1 + α(T - T0)] where α is the temperature coeficcient of restivity, and ρ0 is the restivity at the reference temperature T0. For a particular wire, the temperature coeficcient of restivity is α = 3.83 X 10-3 °C-1, and the restivity is ρ0 = 7.71 X 10-7 Ωm at the reference temperature T0 = 297°C. Find an expression for the temperature T2, at which the resistance of a particular wire will be twice as high as it is at the reference temperature T0. (Both temperatures are in degrees Celsius) Use this expression to find the temperature in degrees Celsius for T2. If the wire has a length of 1.00m and it has a circular cross section with a radius of 1.00cm, what is the resistance in ohms, at a temperature which is twice the reference temperature, T = 2T0 ?a current 2A flows in a copper wire over a length of 3 km and 1,1 mm.known copper conductivity is 5.8×10^7 A/V defined the voltage drop in the missing wires and electrical charge