Same chapter3 marksDifficulty: Medium
Draw the truth table of the NAND gate and explain why it is called a universal gate.
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3 marksDifficulty: Medium
What is a Zener diode and what is it used for?
Original Khojo Papers practice question — not from a past board paper.
Answer
A Zener diode is a heavily doped p-n junction designed to work in reverse breakdown, where the voltage across it stays almost constant over a wide range of current. It is used as a voltage regulator, holding the output steady against changes in the supply or the load.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
It must be used with a series resistance to limit the current.
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