Distinguish between a p-type and n-type semi conductors

​(a) Define doping (1mk)

​Process of introducing foreign element (impurity) into a pure semi-conductor,

​(b) Distinguish between a p-type and n-type semi conductors (2mks)

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​(c) Using a diagram illustrate a forward P-N junction (2mks)

​(d) The figure below shows a bridge circuit 

A capacitor has been connected across the resistor as shown

​(i) Sketch of the figure below the wave form when a CRO is connected across the resistor, R

​(ii) On the same axes, sketch a wave form when C.R.O is connected across R when the capacitor has been removed (1mk)

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