Engineering Answers

• Consider a pn junction in equilibrium at room temperature (T = 300 K) for which the doping concentrations are NA = 1018/cm3 and ND = 1016/cm3 and the cross-sectional area A = 10-4 cm2. Calculate pp, np, nn, pn, V0, W, xn, xp and QJ.​

The numerical value of the volume of a cube is equal to the numerical value of its total surface area.

What is the length of its side?

Find the volume of material needed to build a perimeter wall 10 m x 20 m x 0.30 m thick if the wall is 1.5 m high.

A 12 cm x 14 cm x 6cm box is to be completely wrapped with a foil. Determine the required area of foil.

A prism with an altitude of 15 cm has an octagonal base inscribed in a square with side 10 cm. Find the volume of the prism.

A channel has trapezoidal ends. The top width of the channel is measured to be 6m and the bottom width is 3m. If the

depth of the channel is 4m. Find the volume per meter strip.

What are Register reference instruction format? How it will be derived? Explain with neat sketch. 

Explain the operation of a JK flipflop with a neat diagram. State how it can be converted into a T (toggle) Flipflop.