The expected answers are as follows:

 

 

 

 

 

 

 

            (b)        Advantages of the transistor over the triode include
                        -           smaller size
                        -           cheaper price
                        -           ruggedness
                        -           lower power consumption
                        -           better reliability

            This question was on bipolar transistor and other semiconductor devices.

Candidates that attempted this question in part (a) gave the sketches of the transistor but failed completely on triode.

As many candidates that attempted part (b) answered the question correctly.