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.

If you borrow from a position that contains a 0, you must borrow from the more significant bit that contains a 1. All 0s up to that point become 1s, and the digit last borrowed from becomes a 0.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Arithmetic Operations and Circuits

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2.

What is the collector current for a C-E configuration with a beta of 100 and a base current of 30 mu.gifA?

A.
30 mu.gifA
B.
.3 mu.gifA
C.
3 mA
D.
3 MA

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Bipolar Junction Transistors (BJT)

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3.

An RL filter could be a high-pass or a low-pass filter.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Inductors

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4.

In a dc circuit, the only conversion of energy to heat is in the inductance of the coil itself.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Inductors

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5.

How many connections does a potentiometer have?

A.
1
B.
2
C.
3
D.
4

Your Answer: Option (Not Answered)

Correct Answer: Option C

Explanation:

A potentiometer uses three connections, as opposed to a rheostat, which only employs two. Having three connections allows the potentiometer to vary voltage. Both the potentiometer and the rheostat are classified as variable resistors.

Learn more problems on : Resistance and Power

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6.

If a variable resistor's resistance varies in a nonuniform manner as the shaft is moved, it is considered to be:

A.
linear
B.
defective
C.
not wirewound
D.
tapered

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Resistance and Power

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7.

A "U" shaped, opposite-polarity material built near a JFET-channel center is called the:

A.
gate
B.
block
C.
drain
D.
heat sink

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Field Effect Transistors (FET)

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8.

The truth table for an S-R flip-flop has how many VALID entries?

A.
3
B.
1
C.
4
D.
2

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Flip-Flops and Timers

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9.

What is one disadvantage of an S-R flip-flop?

A.
It has no Enable input.
B.
It has a RACE condition.
C.
It has no clock input.
D.
It has only a single output.

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Flip-Flops and Timers

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10.

When considering conventional current versus electron current flow:

A.
electron current flow came first
B.
protons move in conventional current flow
C.
conventional current flow came first
D.
the direction of current is the same in both methods

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Voltage and Current

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11.

If an electrical system is compared to a fluid system, the electrical current corresponds to the:

A.
pressure
B.
pump
C.
water wheel
D.
water flow

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Voltage and Current

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12.

An oscillator whose frequency can be controlled by an input "control voltage" is called a(n) ______ .

A.
PLL
B.
Schmitt trigger
C.
VCO
D.
S-R latch

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Operational Amplifiers

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13.

With 100 Vac applied to the primary of a transformer so that it draws 500 mA, what will be the 300 Vac secondary current?

A.
1500 mA
B.
200 mA
C.
167 mA
D.
150 mA

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Inductors

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14.

Which of the following is NOT one of the three major types of fixed inductor?

A.
air core
B.
ferrite core
C.
magnesium core
D.
iron core

Your Answer: Option (Not Answered)

Correct Answer: Option C

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15.

In the given circuit, IT equals _____.

A.
0.5 A
B.
2 A
C.
1.5 A
D.
2.5 A

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : RL Circuits

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16.

Which is not an analog-to-digital (ADC) conversion error?

A.
differential nonlinearity
B.
missing code
C.
incorrect code
D.
offset

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Analog and Digital Converters

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17.

Decimal numbers can be converted into binary by dividing by two and recording the remainders.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Number Systems and Codes

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18.

When inductive and capacitive reactance are present in the same series circuit, the magnitude of the total reactance is equal to the sum of the magnitudes of the individual reactances.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : RLC Circuits and Resonance

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19.

As frequency increases

A.
both series and parallel RC impedance decrease
B.
series RC impedance decreases and parallel RC impedance increases
C.
series RC impedance increases and parallel RC impedance decreases
D.
both series and parallel RC impedance increase

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : RC Circuits

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20.

The first integrated circuit was invented in 1959.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Semiconductor Principles

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