CBSE BOARD XII, asked by kulasteshivam, 7 months ago

what do you mean by thermal velocity and drift velocity of moving electrons in cunducter ? drive the relation between drift Velocity and electric current.​

Answers

Answered by mehakmagotra67819
0

Answer:

bhai we are in 9th we can't sorru but you can search it on google hope it will help you

Explanation:

please mark my suggestion as brainliest

Answered by pinkyrose09
0

MARK AS BRAINLIEST PLEASE AND ADD ONLY IMPORTANT POINTS

Explanation: In physics a drift velocity is the average velocity attained by charged particles, such as electrons, in a material due to an electric field. In general, an electron in a conductor will propagate randomly at the Fermi velocity, resulting in an average velocity of zero. Applying an electric field adds to this random motion a small net flow in one direction; this is the drift.  Drift velocity is proportional to current. In a restive material it is also proportional to the magnitude of an external electric field. Thus Ohm's law can be explained in terms of drift velocity. The law's most elementary expression is:

{\display style u=\mu E,}u=\mu E,

where u is drift velocity, μ is the material's electron mobility, and E is the electric field. In the MKS system these quantities' units are m/s, m2/(V·s), and V/m, respectively.

When a potential difference is applied across a conductor, free electrons gain velocity in the direction opposite to the electric field between successive collisions (and lose velocity when traveling in the direction of the field), thus acquiring a velocity component in that direction in addition to its random thermal velocity. As a result there is a definite small drift velocity of electrons, which is superimposed on the random motion of free electrons. Due to this drift velocity, there is a net flow of electrons opposite to the direction of the field.

Thermal velocity or thermal speed is a typical velocity of the thermal motion of particles that make up a gas, liquid, etc. Thus, indirectly, thermal velocity is a measure of temperature. Technically speaking, it is a measure of the width of the peak in the Maxwell–Boltzmann particle velocity distribution. Note that in the strictest sense thermal velocity is not a velocity, since velocity usually describes a vector rather than simply a scalar speed. Since the thermal velocity is only a "typical" velocity, a number of different definitions can be and are used. Taking {\displaystyle k_{\text{B}}}k_{\text{B}} to be the Boltzmann constant, {\displaystyle T}T the absolute temperature, and {\displaystyle m}m the mass of a particle, we can write the different thermal velocities

Similar questions
Math, 3 months ago