effective mass of electron 

Dear your explanation is excellent But the mass of the particle is not zero (m#0)when k=0

at inflection point effective mass is infinity and velocity is constant. but a particle with infinite mass should be rest....so why it has a constant velocity?

Extra brilliant never miss it...gud job sir

you should get a big thank you....

Am I the only one who can't see sir but hear him??

h bar is h/2pi in 1:45 not 2pi/h

Outstanding sir

Wonderful explanation sir

Excellent sir

Full explanation of E-k diagram.. dependence of energy, velocity and mass on wave vector k .. i could found only here... Thanks!

excellent

Very nice

Very good sir

How the external force is influenced???

A silicon pm junction at T = 300 K has doping concentrations of Ng = 3 x 10 cm- and N = 8 x 10s cm-, and has a cross-sectional area of A = 5 x 10-$ cm'. Deter- mine thejunction capacitance at (a) VR = 2 v and (b) Vr = 5 V

Thank u sir. For clearing my concepts 👍

What is influence point.....and what is k