Physics Practical Experiment - Verification of De Morgan’s Theorems | 12th Physics : Practical
Chapter: 12th Physics : Practical
Verification of De Morgan’s Theorems
VERIFICATION OF DE MORGAN’S
THEOREMS
AIM:
To
verify De Morgan’s first and second theorems.
COMPONENTS REQUIRED:
Power
Supply (0 – 5V), IC 7400, 7408, 7432, 7404, and 7402, Digital IC trainer kit,
connecting wires.
FORMULA
CIRCUIT DIAGRAM:
De Morgan’s first theorem, De Morgan’s second theorem
PROCEDURE:
i) Verification of De Morgan’s first theorem
·
The connections are made for LHS 
of the theorem as shown in the circuit diagram using appropriate ICs.
·
The output is noted and tabulated for
all combinations of logical inputs of the truth table.
·
The same procedure is repeated for RHS 
of the theorem.
·
From the truth table, it can be shown
that 
ii) Verification of De Morgan’s second theorem
·
The connections are made for LHS 
of the theorem as shown in the circuit diagram using appropriate ICs.
·
The output is noted and tabulated for
all combinations of logical inputs of the truth table.
·
The same procedure is repeated for RHS 
of the theorem.
·
From the truth table, it can be shown
that 
OBSERVATION
De-Morgan’s first theorem, De-Morgan’s second theorem
RESULT
De
Morgan’s first and second theorems are verified.
Note
The
pin diagram for IC 7408, IC 7432 and IC 7404 can be taken from previous
experiment
Precautions
VCC
and ground pins must not be interchanged while making connections. Otherwise
the chip will be damaged.
For
the ICs used, 5V is applied to the pin 14 while the pin 7 is connected to the
ground.
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