The n-p-n BJT has the following doping levels in the E, B and C: NDe = 1.8 e19 cm^-3, NAb = 1.7 e17 cm^-3, NDc = 4.5 e15 cm^-3. The electron drift velocity in the collector depletion region, vs = 1e7 cm/s. The intrinsic electron concentration in Si is 1e10 cm^-3. The relative dielectric permittivity of Si is 11.7. Find the collector depletion region delay time if the collector - base voltage is Vcb = 9 V. (Units: ps)

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false