First Evaluation
No. 1 Define extrinsic semiconductor and intrinsic
semiconductor.
No. 2 At room temperature an intrinsic silicon crystal
acts approximately like a ..................
No. 3 The current in a transistor is split into parts.
Which is the highest and how is it split?
No. 4 Please sketch the basic transistor connections.
No. 5 If the base current is 100 mA and the current gain
is 30, what is the collector current?
No. 6 Sketch a typical set of collector curves, label the
graph and mark the regions of operation.
No. 7 a) Please calculate the current gain b.
b)What is the voltage between collector and ground?
Figure
No. 8 Describe how you can find the base lead of an
unknown transistor with the help of an
ohmmeter.
