The following truth table corresponds to the logic gateA 0 0 1 1B 0 1 0 1X 0 1 1 1
NAND
OR
AND
XOR
A truth table is given below. Which of the following has this type of truth table
A 0 1 0 1B 0 0 1 1y 1 0 0 0
XOR gate
NOR gate
AND gate
OR gate
For the given combination of gates, if the logic states of inputs A, B, C are as follows A = B = C = 0 and A = B = 1, C = 0 then the logic states of output D are
0, 0
0, 1
1, 0
1, 1
Boolean algebra is essentially based on
Truth
Logic
Symbol
Numbers
The logic behind the ‘NOR’ gate is that it gives
Low output when both the inputs are low
High output when both the inputs are high
None of these
A logic gate is an electronic circuit which
Allows electrons flow only in one direction
Works binary algebra
Makes logic decisions
Alternates between 0 and 1 values
A gate has the following truth table P 1 1 0 0Q 1 0 1 0R 1 0 0 0
The gate is
NOR
Which of the following gates will have an output of 1
Which represents NAND gate
What will be the input of A and B for the Boolean expression A+B¯·A·B¯=1
If A and B are two inputs in AND gate, then AND gate has an output of 1 when the values of A and B are
A = 0, B = 0
A = 1, B = 1
A = 1, B = 0
A = 0, B = 1
The Boolean equation of NOR gate is
C = A + B
C=A+B¯
C=A·B
C=A.B¯
This symbol represents
NAND gate
NOT gate
XNOR gate
To get an output 1 from the circuit shown in the figure, the input must be
A = 1, B = 0, C = 0
A = 1, B = 0, C = 1
A = 1, B = 1, C = 0
The combination of the gates shown in the figure below produces
Which logic gate is represented by the following combination of logic gates
The output of the OR gate is 1
If both inputs are zero
If either or both inputs are 1
Only if both inputs are 1
If either input is zero
Which gates are represented by this figure
In a crystal, the atoms are located at the position of
Minimum potential energy
Zero potential energy
Infinite potential energy
The distance between the body centered atom and a corner atom in sodium (a = 4.225 Å) is
3.66 Å
3.17 Å
2.99 Å
2.54 Å
In good conductors of electricity, the type of bonding that exists is
Ionic
Vander Waals
Covalent
Metallic
Bonding is a germanium crystal (semi-conductor) is
Vander Waal's type
A P-type semiconductor can be obtained by adding
Gallium to pure silicon
Antimony to pure germanium
Phosphorous to pure germanium
The valence of an impurity added to germanium crystal in order to convert it into a P-type semiconductor is
5
4
3
The valency of the impurity atom that is to be added to germanium crystal so as to make it an N-type semiconductor, is
Silicon is a semiconductor. If a small amount of As is added to it, then its electrical conductivity
Decreases
Increases
Remains unchanged
Becomes zero
A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement
Resistance of each decreases
Resistance of copper increases while that of germanium decreases
Resistance of copper decreases while that of germanium increases
To obtain a P-type Si semiconductor, we need to dope pure Si with
Aluminium
Phosphorous
Oxygen
Germanium
The electrical conductivity of a semiconductor
Increases with the rise in its temperature
Does not change with the rise in its temperature
First increases and then decreases with the rise in its temperature
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