Online Electronics Test - Electronics Test - Random



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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 output of an RC differentiator is taken from across the capacitor.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Time Response of Reactive Circuits

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2.

If a repetitive-pulse waveform is applied to an RC integrator, the output waveshape depends on the relationship of the circuit time constant and the duty cycle of the input pulses.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Time Response of Reactive Circuits

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3.

A collector characteristic curve is a graph showing:

A.
emitter current (IE) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant
B.
collector current (IC) versus collector-emitter voltage (VCE) with (VBB) base bias voltage held constant
C.
collector current (IC) versus collector-emitter voltage (VC) with (VBB) base bias voltage held constant
D.
collector current (IC) versus collector-emitter voltage (VCC) with (VBB) base bias voltage held constant

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Bipolar Junction Transistors (BJT)

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4.

A current ratio of IC/IE is usually less than one and is called:

A.
beta
B.
theta
C.
alpha
D.
omega

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Bipolar Junction Transistors (BJT)

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5.

Changing ________ can control the voltage gain of a common-source amplifier.

A.
the input voltage
B.
smdelta.gifm
C.
VDD
D.
RS

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Field Effect Transistors (FET)

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6.

Switches are either on or off, but can have multiple poles.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Voltage and Current

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7.

Charges of the same polarity tend to attract one another.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Voltage and Current

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8.

Which resistive component is designed to be temperature sensitive?

A.
Thermistor
B.
Rheostat
C.
Potentiometer
D.
Photoconductive cell

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Voltage and Current

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9.

If two resistors have the same voltage drop in a series circuit, it means:

A.
they are connected in parallel
B.
they are of unequal value
C.
the voltage has doubled
D.
they are of equal value

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Series Circuits

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10.

If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?

A.
11 V
B.
16 V
C.
21 V
D.
80 V

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Series Circuits

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11.

The transconductance curve of a JFET is a graph of:

A.
IS versus VDS
B.
IC versus VCE
C.
ID versus VGS
D.
ID × RDS

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Field Effect Transistors (FET)

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12.

If the capacitor in an RC integrator shorts, the output

A.
is at ground
B.
would measure the same as the input
C.
would measure zero volts
D.
None of the above

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Time Response of Reactive Circuits

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13.

For a Wien-bridge oscillator to produce a sustained sine-wave output, the phase shift around the positive feedback loop must be greater than 0°.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Basic Op-Amp Circuits

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14.

What is another name for a one-shot?

A.
monostable
B.
bistable
C.
astable
D.
tristable

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Flip-Flops and Timers

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15.

What term expresses the frequency of a rectangular wave?

A.
Hz
B.
period
C.
PRF
D.
PRT

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Alternating Current vs Direct Current

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16.

What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?

A.
43.75
B.
70
C.
43,750
D.
70,000

Your Answer: Option (Not Answered)

Correct Answer: Option B

Explanation:

(1,750 x 40)/1000 = 70 kilowatt-hour.

Learn more problems on : Ohm's Law

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17.

A parallel circuit is also used as a divider for:

A.
conductance
B.
voltage
C.
power
D.
current

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Parallel Circuits

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18.

A computerized self-diagnostic for a ROM test uses:

A.
the check-sum method
B.
a ROM listing
C.
ROM comparisons
D.
a checkerboard test

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Semiconductor Memory

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19.

How many NAND circuits are contained in a 7400 NAND IC?

A.
1
B.
2
C.
4
D.
8

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Logic Gates

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20.

It takes 4 mu.gifs for the output voltage of an op-amp to rise from –14 V to +14 V. The slew rate of this op-amp is 3.5 V/mu.gifs.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Operational Amplifiers

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