Advertisements
Advertisements
प्रश्न
The amplification factor of a triode operating in the linear region depends strongly on ____________ .
विकल्प
the temperature of the cathode
the plate potential
the grid potential
the separations of the grid from the cathode and the anode
Advertisements
उत्तर
the separations of the grid from the cathode and the anode
When the triode operating in the linear region, value of plate voltage, grid voltage and plate current is already specified (or fixed). If the grid is near the cathode, then we assume that grid lie in the region where the space charge density is more. There is a chance that grid will pick up electrons from the space charge region of cathode and effect the plate current and hence amplification factor (as we know that amplification factor will depend on the plate current). If the grid is far from the cathode, it will reduce the grid voltage and hence the amplification factor also get affected.
APPEARS IN
संबंधित प्रश्न
The following figure shows the input waveforms (A, B) and the output waveform (Y) of a gate. Identify the gate, write its truth table and draw its logic symbol.
The logic gate which produces LOW output when one of the input is HIGH and produces
HIGH output only when all of its inputs are LOW is called _______.
(A) AND gate
(B) OR gate
(C) NOR gate
(D) NAND gate
Write the truth table for a NAND gate connected as given in the following figure.
Hence identify the exact logic operation carried out by this circuit
Write the truth table for circuit given in figure below consisting of NOR gates and identify the logic operation (OR, AND, NOT) which this circuit is performing.
(Hint: A = 0, B = 1 then A and B inputs of second NOR gate will be 0 and hence Y=1. Similarly work out the values of Y for other combinations of A and B. Compare with the truth table of OR, AND, NOT gates and find the correct one.)
The following figure shows the input waveforms (A, B) and the output waveform (Y) of a gate. Identify the gate, write its truth table and draw its logic symbol.
An AND gate can be prepared by repetitive use of
(a) NOT gate
(b) OR gate
(c) NAND gate
(d) NOR gate.
Show that \[AB + \overline {AB }\] is always 1.
NAND and NOR gates are called universal gates primarily because they ______.
The Boolean expression for NAND gate is
Which logic gate is similar to a function of two series switches?
For the given circuit, the input digital signals are applied at terminals A, B, and C. What would be the output at terminal y?
Truth table for the given circuit (Figure) is ______.
Two car garages have a common gate which needs to open automatically when a car enters either of the garages or cars enter both. Devise a circuit that resembles this situation using diodes for this situation.
How would you set up a circuit to obtain NOT gate using a transistor?
Write the truth table for the circuit shown in figure. Name the gate that the circuit resembles.
An X-OR gate has following truth table:
| A | B | Y |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
It is represented by following logic relation `Y = barA.B + A.barB`. Build this gate using AND, OR and NOT gates.
The given figure shows the waveforms for two inputs A and B and that for the output Y of a logic circuit. The logic circuit is ______.
A logic circuit provides the output Y as per the following truth table:
| A | B | Y |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
The expression for the output Y is:
The output (Y) of the given logic implementation is similar to the output of an/a ______ gate.
The output (Y) of the given logic gate is similar to the output of an/a:
