what are drift and diffusion current?
441832
Diffusion current is a current in a semiconductor caused by the diffusion of charge carriers (holes and/or electrons). ... The drift current, by contrast, is due to the motion of charge carriers due to the force exerted on them by an electric field.
785748
What is the difference between molecular motion and diffusion? Molecular motion is random. Diffusion is movement of particles from where they are in high concentration to where they are in low concentration.
596096
Both involve ion movement. Both use ion channels to move ions across the cell membrane, in or out of the cell. ... Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.
309401
Diffusion vs. "Bulk flow" is the movement/flow of an entire body due to a pressure gradient (for example, water coming out of a tap). "Diffusion" is the gradual movement/dispersion of concentration within a body, due to a concentration gradient, with no net movement of matter.
1112549
Current is the flow of free charges, such as electrons and ions. Drift velocity vd is the average speed at which these charges move. Current I is proportional to drift velocity vd, as expressed in the relationship I=nqAvd I = nqAv d . Here, I is the current through a wire of cross-sectional area A.
712011
Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles move from an area of higher concentration to one of lower concentration.
99835
Conduction current is the actual current whereas displacement current is the apparent current produced by time varying electric field.
1353550
Explanation: Simple diffusion is the movement of molecules from an area of higher concentration to lower concentration. ... Osmosis is the movement of water from an area of less concentration of dissolved particles to an area of high concentration, thus equalizing the concentrations on each side.
683806
Answer and Explanation: Brownian motion is the movement of the particle not in a fixed direction while in diffusion the particle moves in the direction of high concentration to low concentration.
1088617
Ocean currents are divided on the basis of temperature into currents,drifts and streams. The forward movement of surface water of theoceans under the influence of prevailing winds is called drift whereas the ocean current involves the movement of oceanic water in a definite direction with greater velocity.
1078846
What Are Zero-Drift Amplifiers? Zero-drift amplifiers dynamically correct their offset voltage and reshape their noise density. Two commonly used types—auto-zero amplifiers and choppers—achieve nanovolt-level offsets and extremely low offset drifts due to time and temperature.
526593
The individual electron velocity in a metal wire is typically millions of kilometers per hour. In contrast, the drift velocity is typically only a few meters per hour while the signal velocity is a hundred million to a trillion kilometers per hour.
491406
Diffusion is the movement of particles from a high to lower concentration. ... Active transport moves particles from low to higher concentration.
369902
Answer Expert Verified Correct answer: Diffusion is the movement of particles from a high to low concentration, while osmosis is the movement of water from a high particle concentration to a low particle concentration.
827389
In electromagnetism, displacement current density is the quantity ∂D/∂t appearing in Maxwell's equations that is defined in terms of the rate of change of D, the electric displacement field.
1452574
Mass transfer is the transport of mass from one place to another. ... The main difference between mass transfer and diffusion is that mass transfer may or may not involve a concentration gradient whereas diffusion does involve the movement of a solute down a concentration gradient.
685631
The rise and fall of the tides, which are driven by the gravitational attraction of the Sun and Moon on Earth's ocean are another cause of currents. Tidal currents are present in the ocean, near the shore, in bays and estuaries, and along the coast. The speed and direction of tidal currents are predictable.