Online Electronics Test - Electronics Test - Random



Loading...  Loading Test...

Instruction:

  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).

1.

The application of DeMorgan's theorems to a Boolean expression with double and single inversions produces a resultant expression that contains only single inverter signs over single variables.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Logic Circuit Simplification

Discuss about this problem : Discuss in Forum

2.

What is the total current?

A.
15.6 mA
B.
17.8 mA
C.
21.9 mA
D.
26.0 mA

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : RLC Circuits and Resonance

Discuss about this problem : Discuss in Forum

3.

When used as a comparator, an op-amp is wired in a closed-loop configuration.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Basic Op-Amp Circuits

Discuss about this problem : Discuss in Forum

4.

The impedance of the circuit in the given circuit is approximately equal to _____.

A.
2 komega.gif
B.
750 omega.gif
C.
1.25 komega.gif
D.
1 komega.gif

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : RL Circuits

Discuss about this problem : Discuss in Forum

5.

If a branch opens in a parallel circuit, the total circuit resistance decreases.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Parallel Circuits

Discuss about this problem : Discuss in Forum

6.

In the given circuit, what must the pulse width and time between pulses be to allow the capacitor to completely charge by the end of each pulse and to completely discharge between each pulse?

A.
940 mu.gifs
B.
2.82 ms
C.
3.76 ms
D.
4.7 ms

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Time Response of Reactive Circuits

Discuss about this problem : Discuss in Forum

7.

D-MOSFETs are sometimes used in series to construct a cascode high-frequency amplifier to overcome the loss of:

A.
low output impedance
B.
capacitive reactance
C.
high input impedance
D.
inductive reactance

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Field Effect Transistors (FET)

Discuss about this problem : Discuss in Forum

8.

A PLL can be used as a(n) ___________.

A.
series voltage regulator
B.
frequency multiplier
C.
relaxation oscillator
D.
Schmitt trigger

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Operational Amplifiers

Discuss about this problem : Discuss in Forum

9.

A capacitor takes ___ time constants to charge to 95% of its capacity.

A.
2
B.
3
C.
4
D.
5

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Capacitors

Discuss about this problem : Discuss in Forum

10.

The logic gate that will have HIGH or "1" at its output when any one of its inputs is HIGH is a(n):

A.
OR gate
B.
AND gate
C.
NOR gate
D.
NOT gate

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Logic Gates

Discuss about this problem : Discuss in Forum

11.

The average value of a sine wave is .707 times the peak value.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Alternating Current vs Direct Current

Discuss about this problem : Discuss in Forum

12.

What does VS equal in the given circuit?

A.
0 V
B.
9 V
C.
27 V
D.
More information is needed to find VS.

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Parallel Circuits

Discuss about this problem : Discuss in Forum

13.

The voltage V2 is _____ in the given circuit.

A.
36.7 V
B.
73.3 V
C.
110 V
D.
220 V


Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Transformers

Discuss about this problem : Discuss in Forum

14.

The impedance in an RC parallel circuit is tfq7_10016_1.gif

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Capacitors

Discuss about this problem : Discuss in Forum

15.

A reverse biased diode will act as an open switch.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Diodes and Applications

Discuss about this problem : Discuss in Forum

16.

Ten TTL loads per TTL driver is known as:

A.
noise immunity
B.
power dissipation
C.
fanout
D.
propagation delay

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Standard Logic Devices (SLD)

Discuss about this problem : Discuss in Forum

17.

If a 47 omega.gif and a 68 omega.gif resistor are connected in series, the total resistance is ___.

A.
3,196 omega.gif
B.
less than 47 omega.gif
C.
less than 68 omega.gif
D.
115 omega.gif

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Series Circuits

Discuss about this problem : Discuss in Forum

18.

A TRIAC will control AC voltage during the positive half cycle only.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Thyristors and Tranducers

Discuss about this problem : Discuss in Forum

19.

Most practical alternators generate electricity from

A.
a coil rotating within a magnetic field
B.
a magnetic field rotating around fixed windings
C.
a permanent magnet rotating within a varying electromagnetic field
D.
none of the above

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Alternating Current and Voltage

Discuss about this problem : Discuss in Forum

20.

A 2% 55 k resistor would have a color coding of green, green, black, red, red.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Resistance and Power

Discuss about this problem : Discuss in Forum

Submit your test now to view the Results and Statistics with answer explanation.