The input resistance at the base of a biased transistor depends mainly on (a) bDC
(b) RB
(c) RE
(d) bDC and RE

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above