Which of the following truth tables represents the behaviour of a NAND gate in aburglar alarm?
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The correct answer is Option B. A NAND gate produces an output that is false only when all its inputs are true; otherwise, the output is true. In the context of a burglar alarm, a NAND gate can be used to ensure that the alarm is triggered unless all conditions are met (e.g., all sensors are inactive). The other options do not match this behavior: Option A and Option D might represent other logic gates like AND, while Option C could represent OR or another gate.
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About Rectification
Rectification converts alternating current into unidirectional current using semiconductor diodes. The content includes half wave and full wave rectifiers, bridge circuits, output waveforms, ripple and smoothing with capacitors, with the difference between rectification and voltage regulation kept clear.
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