WAEC Physics 2017 Theory — Question 8

Question 8 of 33 from the West African Examinations Council (WAEC) Physics 2017 Theory paper, with the correct answer and a full explanation.

7. List three advantages of p-n junction diode over diode valve

Model answer

Advantages of p-n junction diode over diode valve: (i) Smaller size (ii) Lower operating voltage (iii) Lighter weight (iv) Higher efficiency (v) Lower power dissipation (vi) Instant on (i.e. no heater warm-up time) (any three).

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