Question

A researcher wants an alarm to sound when the
temperature of air in his controlled research chamber
rises above 40°C or falls below 20°C. The alarm can
be triggered by the output of a
(a) NOT gate
(c) NAND gate
(b) AND gate
(d) OR gate​

Answer 1

Given:

A researcher wants an alarm to sound when the temperature of air in his controlled research chamber rises above 40°C or falls below 20°C.

To find:

The alarm can be triggered by the output of a

(a) NOT gate

(c) NAND gate

(b) AND gate

(d) OR gate​

Solution:

OR gate - a logical operation that gives the value one if at least one operand has the value one, and otherwise gives a value of zero.

So, as a researcher wants an alarm to sound when the temperature of air in his controlled research chamber rises above 40°C or falls below 20°C, we need to use OR gate.

Option (d) OR gate is correct option.