Logic Gates (OR. AND. NOT. NAND and NOR) NEET Questions

Physics - Electronic Devices

Logic Gates (OR. AND. NOT. NAND and NOR) MCQ Questions


1.
In digital electronics, logic '1' typically represents:
A.
Negative voltage
B.
Zero current
C.
Low voltage level (0 V)
D.
High voltage level (e.g., 5 V or HIGH state)
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ANSWER :
D. High voltage level (e.g., 5 V or HIGH state)
2.
In digital electronics, logic '0' typically represents:
A.
High voltage level (5 V)
B.
Maximum voltage in circuit
C.
Low voltage level (0 V or LOW state)
D.
Negative infinity
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ANSWER :
C. Low voltage level (0 V or LOW state)
3.
A logic gate is a digital circuit that:
A.
Amplifies analog signals
B.
Stores binary information indefinitely
C.
Performs basic logical operations on one or more binary inputs to produce a binary output
D.
Generates AC voltage from DC
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ANSWER :
C. Performs basic logical operations on one or more binary inputs to produce a binary output
4.
The system of binary numbers used in logic gates has only:
A.
Sixteen digits: 0-F
B.
Eight digits: 0-7
C.
Two digits: 0 and 1
D.
Ten digits: 0-9
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ANSWER :
C. Two digits: 0 and 1
5.
In a 2-input OR gate, the output is HIGH (1) when:
A.
Both inputs are LOW (0)
B.
Both inputs are HIGH (1) only
C.
Inputs are different
D.
At least one input is HIGH (1)
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ANSWER :
D. At least one input is HIGH (1)
6.
The Boolean expression for an OR gate with inputs A and B is:
A.
Y = A + B
B.
Y = A ยท B
C.
Y = Aฬ…
D.
Y = A โŠ• B
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ANSWER :
A. Y = A + B