A junction field effect transistor behaves as a
Select an option to see the answer and solution.
Engineering Physics · all questionsElectronics
Electronics
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
66
Questions
2/4
Page
Pick an option on a question to see the right answer and solution.
In the following circuit, the voltage across and the current through the 2 k resistance are
Select an option to see the answer and solution.
The Boolean expression Y = D + CD + B D + BCD reduces to
Select an option to see the answer and solution.
A doped germanium crystal of length 2 cm, breadth 1 cm and width 1 cm, carries a current of 1 mA along its length parallel to +X-axis. A magnetic field of 0.5 T is applied along +Z-axis. Hall voltage of 6 mV is measured with negative polarity at y = 0 plane. The sign and concentration of the majority charge carrier are, respectively [Given, e = 1.6 × 10-19 C]
Select an option to see the answer and solution.
In the given digital logic circuit, A and B form the inputs. The output Y is
Select an option to see the answer and solution.
Figure shows a common emitter amplifier with β = 100. What is the maximum peak-to-peak input signal (Vs) for which distortion-free output may be obtained? [ Assume VBE = 0 and re = 20 ]
Select an option to see the answer and solution.
The following Boolean expression can be simplified to
Select an option to see the answer and solution.
The inverting input terminal of an operational amplifier (op-amp) is shorted with the output terminal apart from being grounded. A voltage signal V1 is applied to the non-inverting input terminal of the op-amp. Under this configuration, the op-amp function is as
Select an option to see the answer and solution.
In the T-type master-slave J-K flip-flop is shown along with the clock and input waveforms. The Qn output of flip-flop was zero initially. Identify the correct output waveform.
Select an option to see the answer and solution.
A n-channel silicon (dielectric constant = 12) FET with a channel width a = 2 × 106 m is doped with 1021 electron/m3. The pinch-off voltage is
Select an option to see the answer and solution.
A ripple counter designed with J-K flip-flops provided with CLEAR (Cl.) input is shown in the figure. In order that this circuit functions as a MOD-12 counter, the NAND gate inputs (X1 and X2) should be
Select an option to see the answer and solution.
Figure shows a practical integrator with Rs = 30 M, RF = 20 M and CF = 0.1 μF. If a step (DC) voltage of
+3 V is applied as input for 0 ≤ t ≤ 4 (t is in second), the output voltage is
Select an option to see the answer and solution.
Under normal operating conditions, the gate terminals of an n-channel Junction Field Effect Transistor UFET) and an n-channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) are
Select an option to see the answer and solution.
The registers QD, QC, QB and QA shown in the figure are initially in the state 1010 respectively. An input sequence SI = 0101 is applied. After two clock pulses, the state of the shift registers (in the same sequence QD QC QB QA) is
Select an option to see the answer and solution.
The output Vo of the ideal op-amp circuit shown in the figure is
Select an option to see the answer and solution.
For the rectifier circuit shown in the figure, the sinusoidal voltage (V1 or V2) at the output of the transformer has a maximum value of 10 V. The load
resistance RL, is 1 k. If lav is the average current through the resistor RL, the circuit corresponds to a
Select an option to see the answer and solution.
Which one of the following is true for a semiconductor p-n junction with no external bias?
Select an option to see the answer and solution.
The feedback ratio of an amplifier, which on application of a negative feedback, changes the voltage gain from -250 to -100 is
Select an option to see the answer and solution.
When an input voltage Vin, of the form shown, is applied to the circuit given below, the output voltage Vo is of the form
Select an option to see the answer and solution.
A half-adder is a digital circuit with
Select an option to see the answer and solution.