Prof. X wrote the equation for electrical current density resulting from drift. A student from ECE344 immediately wrote the equation for holes based on a symmetry argument as follows: Op. Is the student correct? Explain your answer.
Added by Matthew D.
Close
Step 1
The equation is given by: J = q * n * v where J is the current density, q is the charge of the carrier (either electrons or holes), n is the carrier density, and v is the drift velocity. Now, the student claims that the equation for holes can be obtained from Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 86 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A student claimed that the equation for the electric field outside a cube of edge length $L$, carrying a uniformly distributed charge $Q,$ at a distance $x$ from the center of the cube, was $$E=\frac{Q}{\varepsilon_{0}} \frac{L}{x^{1 / 2}}$$ Explain how you know that this cannot be the right equation.
Sri K.
Question 5 a) A student measures the electric flux through a closed spherical surface of volume V to be X. She then removes the charge from inside the spherical surface and places it in a closed cylindrical surface of volume V/2. She then claims that the flux through the cylindrical surface is 2X. Is the student right or wrong ? Give reasons to your answers (Show all necessary calculation if possible)
Consider an infinite plane (non-conducting) with a uniform negative surface charge density σ. a) Draw a sketch of the electric field (using field lines) close to the plane. (b) Explain in words why the field has to look the way you have drawn (using symmetry arguments). (Keep your explanation to 2-3 sentences)
Shyam P.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Watch the video solution with this free unlock.
EMAIL
PASSWORD