Consider a short cylinder with its axis parallel to the drift velocity. Ithas a cross-sectional area A, a length vd At, and a volume Avd At. If thereare n charge carriers per volume, each of charge q, the charge in thatcylinder is(charge)(carriers/volume)(volume), orAQ = (q)(n)(Avd At).Now we substitute this expression for AQ = Iat. The current density isJ=nqvd. If there is more than one type of charge carrier, we simply add the%3Dcurrent densities for eeach type of charge carrier to find the total currentdensity. Silicon is doped with aluminum until it has 5.0 x 1023 holes/m3 asits positive charge carriers and almost no free electrons. If the currentdensity in the doped silicon is 16.0 A/m- î calculate the drift velocity of theholes. UseI and q= 1.6 x10-19Cnq8.0 x 10-4m/s5.0 x 10 23m/sre2.0 x 10-4m/sO.1.6 x 10-19m/s

Now we substitute this expression for AQ = IAt. The current density %3D J=nqvd. If there is more than one type of charge carrier, we simply add current densities for eeach type of charge carrier to find the total curn density. Silicon is doped with aluminum until it has 5.0 x 1023 holes/m its positive charge carriers and almost no free electrons. If the cur

Now we substitute this expression for AQ = IAt. The current density %3D J=nqvd. If there is more than one type of charge carrier, we simply add current densities for eeach type of charge carrier to find the total curn density. Silicon is doped with aluminum until it has 5.0 x 1023 holes/m its positive charge carriers and almost no free electrons. If the cur

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 78P: The prefix “mega” (M) and “kilo” (k), when referring to amounts of computer data, refer to factors...

See similar textbooks

Similar questions

The voltage V (volts), current I (amperes), andresistance R (ohms) of an electric circuitare related by the equation V = IR. Suppose that V is increasing atthe rate of 1 volt/sec while I is decreasing at the rate of 1/3 amp/sec. Let t denote time in seconds. What is the value of dI/dt?
sq 4. Maximum surface resistance. Consider a square sheet of side L, thickness d, and electrical resistivity p. The resistance measured between opposite edges of the sheet is called the surface resistance: R = pL/ Ld = p/d, which is independent of the area of the sheet. (R is called the resistance per square and is expected in ohms per square, because p/d has the dimensions of ohms.) If we express p by p=m/ne²t, then Rq=m/ndet. Suppose now that the minimum value of the collision time is determined by scattering from surfaces of the sheet, so that Td/v, where v is the Fermi velocity. Thus the maximum surface resistivity is Rmvp/nd²e². Show for a monatomic metal sheet one atom thickness that sq Rħ/e² = 4.1k, where lkn is 10³ ohms. sq
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)
During an experiment to verify Ohm's law, the current and resistance of a circuit are measured. [Resistance is measured in Ohm () and current in Ampere (A)]. www R +, Battery The measured value of the current is I 3±0.1 A and that of the resistance is R = 17+0.3 . The voltage applied (in Volts) can be calculated using the formula, V = IR. Calculate the, a) Voltage applied in the circuit (in Volts) = b) Fractional uncertainty in the voltage = c) Absolute uncertainty (in Volts) in the voltage =
In the last column in the data table, it says that it's about voltage(v) divided by current(A) is equal to ohms so V/A = ohms. So if it's V/A and if you divide them to get the slope it's (y2-y1)/(x2-x1) then shouldn't V be the y value and A be the x value? And can you also try to use a line of best bit instead of drawing the line through each dot?
Hwwww In the circuit in Fig. 2.137, the wiper divides the potentiometer resistance between aR and (1 – a)R, 0 sa< 1. Find v/v,. R R. aR
What minimum diameter is required for the wire? Express your answer to two significant figures and include the appropriate units.
1.3 Find the charge q(t) flowing through a device if the current is: (d) i(t) = 10e-30r sin 40t A, q(0) = 0
The prefix “mega” (M) and “kilo” (k), when referring to amounts of computer data, refer to factors of 1024 or 210 rather than 1000 for the prefix kilo, and 10242 = 220 rather than 1,000,000 for the prefix Mega (M). If a wireless (WiFi) router transfers 150 Mbps of data, how many bits per second is that in decimal arithmetic?
The quantity of charge through a conductor is modeledas Q=4.00Cs4t41.00Cst+6.00mc .What is the current at time t = 3.00 s?
A 5 strand conductor is arranged in a cross. Find the Area (in cmil) of the wire if inner radius is 2 mm. Note: Outside diameter of the biggest circle is 12 mm
Find the voltage (in V) across R,. Find the current (in A) in R,