Q. A researcher wants an alarm to sound when the temperature of air in his controlled research chamber rises above $40{^\circ}C$ or falls below $20{^\circ}C$. The alarm can be triggered by the output of a
A) AND gate
B) NAND gate
C) NOT gate
D) OR gate
Explanation
The correct answer is Option D: OR gate.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.