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General
Easy
Question
Truth table for system of four NAND gates as shown in figure is :
The correct answer is:
Related Questions to study
Physics-
A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. 
The current (I) in the resistor (R) can be shown by:
A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The current (I) in the resistor (R) can be shown by:
Physics-General
Physics-
The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct out put waveform.
The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct out put waveform.
Physics-General
Physics-
In the circuit below, A and B represent two inputs and C represents the output. 
The circuit represents
In the circuit below, A and B represent two inputs and C represents the output. The circuit represents
Physics-General
Physics-
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Physics-General
Physics-
If in p-n junction diode, a square input signal of 10 V is applied as shown. Then the output signal across R L will be
If in p-n junction diode, a square input signal of 10 V is applied as shown. Then the output signal across R L will be
Physics-General
Physics-
The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?
The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?
Physics-General
Physics-
If the lattice constant of this semiconductor is decreased, then which of the following is correct?
If the lattice constant of this semiconductor is decreased, then which of the following is correct?
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Physics-
Degree of modulation –
Degree of modulation –
Physics-General
Physics-
Consider telecommunication through optical fibres. Which of the following statements is not true
Consider telecommunication through optical fibres. Which of the following statements is not true
Physics-General
Physics-
A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
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Physics-
The waves which can travel directly along surface of the earth are known as
The waves which can travel directly along surface of the earth are known as
Physics-General
Physics-
Hertz produced electromagnetic wave by using
Hertz produced electromagnetic wave by using
Physics-General
Physics-
For the given circuit shown in fig, to act as full wave rectifier, a.c. input should be connected across ........and........the d.c. output would appear across........and........
For the given circuit shown in fig, to act as full wave rectifier, a.c. input should be connected across ........and........the d.c. output would appear across........and........
Physics-General
Physics-
Two identical P-N junction may be connected in series with a battery in three ways (fig below). The potential drops across the two P-N junction are equal in-
Two identical P-N junction may be connected in series with a battery in three ways (fig below). The potential drops across the two P-N junction are equal in-
Physics-General
Physics-
If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :
If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :
Physics-General
