The following configuration of the logic gate is equivalent to

         

1.  NAND gate

2.  XOR gate

3.  OR gate

4.  NOR gate

 

Subtopic:  Logic gates |
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To get output 1 for the following circuit, the correct choice for the input is

                       

(1) A=1, B=0, C=0       

(2) A=1, B=1, C=0

(3) A=1, B=0, C=1       

(4) A=0, B=1, C=0

Subtopic:  Logic gates |
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The output (x) of logic circuit shown in figure will be 

 

(1) X=A=·B=

(2) X=A.B¯

(3)X=A·B

(4)X=A+B¯

Subtopic:  Logic gates |
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The figure shows a logic circuit with two inputs A and B and the output C.The voltage wave forms across A, B and C are as given.The logic circuit gate is 

1. OR gate                                          2. NOR gate

3. AND gate                                        4. NAND gate

Subtopic:  Logic gates |
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Symbolic representation of four logic gates

are shown as

(i) 

(ii) 

(iii) 

(iv) 

Pick out which ones are for AND, NAND and 

NOT gates, respectively.

(a) (iii), (ii)and (i)

(b) (iii), (ii) and (iv)

(c) (ii), (iv) and (iii)

(d) (ii), (iii) and (iv)

Subtopic:  Logic gates |
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The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given

                            

The logic gate is 

(1) NOR gate                                                 

(2) OR gate

(3) AND  gate                                                 

(4) NAND gate

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The symbolic representation of four logic gates 

                                       

                           (i)                                                                              (ii)

 

                                

                           (iii)                                                                              (iv)

The logic symbols for OR, NOT and NAND gates are respectively

(a)    (iii), (iv), (ii)                                            (b)   (iv), (i), (iii)

(c)    (iv), (ii), (i)                                              (d)   (i), (iii), (iv) 

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The circuit is equivalent to

1. AND gate                              2. NAND gate

3. NOR gate                              4. OR gate 

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Given below are symbols for some logic gates

The XOR gate and NOR gate respectively are 
(a) 1 and 2                  (b) 2 and 3
(c) 3 and 4                  (d) 1 and 4

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Given below are four logic gate symbol (figure). Those for OR, NOR and NAND are respectively 

(a) 1, 4, 3                     (b) 4, 1, 2
(c) 1, 3, 4                     (d) 4, 2, 1

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