The logic gate which produces a LOW output only when all its inputs are HIGH is:
1
AND
2
OR
3
NAND
4
NOR
Official Solution
Correct Option: (3)
Step 1: Concept
Examine the truth tables of standard gates. Step 2: Analysis
An AND gate gives HIGH only when all inputs are HIGH. A NAND gate (NOT-AND) reverses this, giving LOW only when all inputs are HIGH. Step 3: Conclusion
The gate is a NAND gate. Final Answer: (C)
02
PYQ 2009
medium
physicsID: met-2009
The one which has least iodine value is
1
sunflower oil
2
ginger oil
3
ghee
4
groundnut oil
Official Solution
Correct Option: (3)
Step 1: Concept
Iodine value is a measure of the degree of unsaturation (presence of double bonds) in fats and oils. Step 2: Analysis
High iodine value indicates more unsaturation. Low iodine value indicates higher saturation. Step 3: Comparison
Ghee is mostly composed of saturated fatty acids and has the least amount of unsaturation among the given options. Therefore, it has the least iodine value. Final Answer: (c)
03
PYQ 2015
medium
physicsID: met-2015
The following configuration of gate is equivalent to
1
NAND
2
XOR
3
OR
4
None of these
Official Solution
Correct Option: (2)
Step 1: Understanding the Concept:
The circuit shows a combination of gates. Let's derive the output expression. Step 2: Detailed Explanation:
The given configuration has two AND gates, one OR gate, and NOT gates at inputs. Output . This is the expression for XOR gate. Step 3: Final Answer:
