To get an output 1 from the circuit shown in the figure, the input must be 


(a) A = 0, B = 1, C = 0
(b) A = 1, B = 0, C = 0
(c) A = 1, B = 0, C = 1
(d) A = 1, B = 1, C = 0

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The combination of the gates shown in the figure below produces 


(a) NOR gate
(b) OR gate
(c) AND gate
(d) XOR gate

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Which logic gate is represented by the following combination of logic gates 

(a) OR             (b) NAND
(c) AND           (d) NOR

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The output of OR gate is 1 

(a) If both inputs are zero

(b) If either or both inputs are 1

(c) Only if both input are 1

(d) If either input is zero

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Which gates is represented by this figure 

(a) NAND gate
(b) AND gate
(c) NOT gate
(d) OR gate

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Which of the following logic gate is an universal gate?

1. OR                       

2. NOT

3. AND                     

4. NOR

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In a crystal, the atoms are located at the position of

(a) Maximum potential energy

(b) Minimum potential energy

(c) Zero potential energy

(d) Infinite potential energy

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Types of semiconductors
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The distance between the body centred atom and a corner atom in sodium (a = 4.225 Å) is 
(a) 3.66 Å                         (b) 3.17 Å
(c) 2.99 Å                         (d) 2.54 Å

Concept Questions :-

Types of semiconductors
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In good conductors of electricity, the type of bonding that exists is 
(a) Ionic                     (b) Vander Waals
(c) Covalent                (d) Metallic

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Types of semiconductors
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Bonding in a germanium crystal (semi- conductor) is

(a) Metallic                         (b) Ionic
(c) Vander Waal's type         (d) Covalent

Concept Questions :-

Types of semiconductors
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