Online Electronic Devices Test - Electronic Devices Test - Random

Instruction:

This is a FREE online test. Beware of scammers who ask for money to attend this test.
Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
DO NOT refresh the page.
All the best!

A silicon diode in a half-wave rectifier has a barrier potential of 0.7 V. This has the effect of

reducing the peak output voltage by 0.7 V.

increasing the peak output voltage by 0.7 V.

reducing the peak input voltage by 0.7 V.

no effect.

[#]

The intersection of the load line with the characteristic curve determines the ________ of the system.

point of operation

load-line analysis

characteristic curve

forward bias

[#]

In what decade was the first transistor created?

1930s

1940s

1950s

1960s

[#]

In a transistor-switching network, the level of the resistance between the collector and emitter is ________ at the saturation and is ________at the cutoff.

low, low

low, high

high, high

high, low

[#]

Calculate V_D.

23.0 V

17.0 V

4.6 V

12.4 V

[#]

In a feedback-bias configuration, the slope of the dc load line is controlled by ________.

R_G

R_D

V_DG

None of the above

[#]

Referring to the following figure, calculate g_m for V_{GS_Q} = –1.25 V.

2 mS

2.5 mS

2.75 mS

3.25 mS

[#]

Which of the following is a required condition to simplify the equations for Z_o and A_v for the self-bias configuration?

r_d

10R_D

r_d = R_D

r_d

10R_D

None of the above

[#]

The ________ controls the ________ of an FET.

I_D, V_GS

V_GS, I_D

I_G, V_DS

I_G, I_D

[#]

10.

What is the range of the capacitor C_ds?

0.01 to 0.1 pF

0.1 to 1 pF

0.1 to 1 nF

0.1 to 1 F

[#]

11.

The output voltage of a voltage buffer is ________ with the input voltage.

in phase

45º out of phase

90º out of phase

180º out of phase

[#]

12.

What is (are) the level(s) of the input voltage to a ladder-network conversion?

V_ref

0 V or V_ref

None of the above

[#]

13.

The ________ the ac variation with respect to the dc level, the ________ the filter circuit's operation.

smaller, better

larger, better

smaller, worse

None of the above

[#]

14.

The ________ the diode conduction time, the ________ the amount of the charging current through the capacitor filter.

shorter, larger

shorter, smaller

longer, larger

None of the above

[#]

15.

Refer to this figure. Which symbol is correct for a zener diode?

[#]

16.

Refer to the given figure. The most probable cause of trouble, if any, from these voltage measurements is

the base-emitter junction is open.

R_E is open.

a short from collector to emitter.

no problems.

[#]

17.

The Q-point in a JFET with voltage-divider bias is more stable than in a self-biased JFET.

True

False

[#]

18.

An RC network has a roll-off of 20 dB per decade. What is the total attenuation between the output voltage in the midrange of the passband as compared to the output voltage at a frequency of 10 times f_c?

–3 dB

–20 dB

–23 dB

–43 dB

[#]

19.

Refer to the given figure. Determine the lower trigger point.

+V_(out)max

–V_(out)max

–2.47 V

+2.47 V

[#]

20.

Identify the frequency response curve for a band-pass filter.

[#]

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers

Online Electronic Devices Test - Electronic Devices Test - Random

Marks : 2/20

Test Review : View answers and explanation for this test.

Current Affairs

Interview Questions

Group Discussions