Derive an expression relating the intrinsic level E, to the center of the band gap Eg/2. Calculate the displacement of £, from Eg/2 for Si at 300 K, assum- ing the effective mass values for electrons and holes are l. lw0 and 0.56/M0> respectively.

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m