Question

If V = 2 V, L = 2 cm, W = 1 cm, H = 0.3...

If V = 2 V, L = 2 cm, W = 1 cm, H = 0.3 cm, and material conductivity σ=5 S/m,

a. Calculate the electric field in the resistor (assume uniform throughout).

b. Calculate the force on a single electron.

c. Calculate the material resistivity (conductivity is given). Report your answer in Ω-cm.

d. Using your answer from (a), and knowing J=σE, calculate the current density flowing in the resistor.

e. Calculate the resistance of the resistor.

f. Using V and R, calculate the current flowing through the resistor.

g. Calculate the current density by dividing your answer from (f) by the cross-section area. Compare with your answer to (d).

h. Knowing the conductivity, calculate the electron mobility for n = 1014 cm-3 .

i. With knowledge of the electric field and mobility, calculate the drift velocity of the electrons.

j. Sketch a figure that shows indicates the directions of E, J, and vdn

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The electron concentration in a semiconductor is given by n = 1016((1-2x)/L) cm-3 for 0 ≤...
The electron concentration in a semiconductor is given by n = 1016((1-2x)/L) cm-3 for 0 ≤ x ≤ L, where L = 15 μm. The electron mobility and diffusion coefficient are μn = 1200cm2/V-s and Dn = 30.9cm2/s. An electric field is applied such that the total electron current density is a constant over the given range of x and is Jn = -50 A/cm2 . (a) Determine the electron diffusion current density (b) Determine the required electric field versus...
A circular cylinder with a radius R of 1 cm and a height H of 2...
A circular cylinder with a radius R of 1 cm and a height H of 2 cm carries a charge density of pv = h R^2 uC/cm^3 (h is a point on the z-axis). The cylinder is then placed on the xy plane with its axis the same as the z-axis. Find the electric field intensity E and and the electric potential V on point A on z-axis 2 cm from the top of the cylinder.
A copper wire with diameter of 1,5 mm and length of 4m carries constant current of...
A copper wire with diameter of 1,5 mm and length of 4m carries constant current of 1.75 A. The free electron density in the wire is 8,5x1028 m-3. The resistivity of copper is 1,72x10-8 capital omega.m. Calculate a) current density, b)drift velocity, c) magnitude of electric field, d) potential between the terminals of wire, e)power dissipated as heat f) mean free time. (mass of electron: 9,1x10-31kg, magnitude of charge of electron: 1,6x10-19 C)
A copper wire with diameter of 1,5 mm and length of 4m carries constant current of...
A copper wire with diameter of 1,5 mm and length of 4m carries constant current of 1.75 A. The free electron density in the wire is 8,5x1028 m-3. The resistivity of copper is 1,72x10-8 .m. Calculate   a) current density, b)drift velocity, c) magnitude of electric field, d) potential between the terminals of wire, e)power dissipated as heat f) mean free time. (mass of electron: 9,1x10-31kg, magnitude of charge of electron: 1,6x10-19 C)
2 Drift Velocity The average velocity of electrons in a material with a scattering time τ...
2 Drift Velocity The average velocity of electrons in a material with a scattering time τ is vd = eE me τ. The scattering time also determines the resistivity of the material: ρ = me ne2τ . Here, n is the free electron density of the material — the number of free electrons per cubic meter. (a) Estimate the free electron density in copper. There is one free electron per copper atom. The mass density of copper is 8.92 g/cm3...
An aluminum wire with a diameter of 0.105 mm has a uniform electric field of 0.265...
An aluminum wire with a diameter of 0.105 mm has a uniform electric field of 0.265 V/m imposed along its entire length. The temperature of the wire is 45.0° C. Assume one free electron per atom. (a) Use the information in this Table of Resistivities and Temperature Coefficients to determine the resistivity of aluminum at this temperature. ρ = ..... Ω·m (b) What is the current density in the wire? J =....... MA / m2 (c) What is the total...
An aluminum wire with a diameter of 0.095 mm has a uniform electric field of 0.225...
An aluminum wire with a diameter of 0.095 mm has a uniform electric field of 0.225 V/m imposed along its entire length. The temperature of the wire is 45.0° C. Assume one free electron per atom. (a) Use the information in this Table of Resistivities and Temperature Coefficients to determine the resistivity of aluminum at this temperature. ρ =  Ω·m (b) What is the current density in the wire? J =  MA / m2 (c) What is the total current in the...
A thin metal film of length 1.20 cm, width of 0.300 cm, and thickness of 31.0...
A thin metal film of length 1.20 cm, width of 0.300 cm, and thickness of 31.0 micrometers is used to measure the Hall effect. A current of 2.20 A is maintained along the length of the sample. The Hall voltage of 26.8 microVolts is detected across its width, when a magnetic field of 2.00 Tesla is applied normal to the film. a. Calculate the drift velocity of the charge carriers. b. Assuming the charge carriers are electrons, calculate their density....
10. A circular cylinder with a radius R of 1 cm and a height H of...
10. A circular cylinder with a radius R of 1 cm and a height H of 2 cm carries a charge density of ρV = H r2 sin φ µC/cm3 (r is a point on the z-axis, φ is an azimuthal angle). The cylinder is then placed on the xy plane with its axis the same as the z-axis. Find the electric field intensity E and the electric potential V on point A on z-axis 2 cm from the top...
A copper wire 100m long with cross-sectional area of 2x10^-4 cm^2 is heated from room temperature...
A copper wire 100m long with cross-sectional area of 2x10^-4 cm^2 is heated from room temperature of 25 C to 200 C. Find a) The initial resistance of wire b) The increase in resistance from 25 to 200 C c) The drift speed of the “electron group” in the wire, if the current is 3A and density of electrons is 8.5x10^28 electrons /m 3 d) The voltage drop across the wire resistor for this current of 3A e) The power...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT