Post-UTME Physics 2018 Objective — Question 8
Question 8 of 20 from the Post-UTME Screening (Post-UTME) Physics 2018 Objective paper, with the correct answer and a full explanation.
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A diode valve consists of a
- A. Cathode, an anode and a heater
- B. cathode, an anode and a grid
- C. cathode and an anode onlyCorrect
- D. cathode and a grid only
Explanation
A diode valve is the simplest type of thermionic valve, consisting of just two electrodes: a cathode and an anode.
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