Online Electronics Test - Electronics Test 8

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!

Which of the following is expressed in engineering notation?

470 × 10⁵

82 × 10^–2

9.1 × 10^–6

14.7 × 10⁸

[#]

What are the unit and symbol for current?

Ampere, A

Coulomb, I

Ampere, Q

Ampere, I

[#]

The atomic number is the number of neutrons in the nucleus of an atom.

True

False

[#]

A string of resistors in a series circuit will:

divide the source voltage in proportion to their values

reduce the power to zero

cause the current to divide

increase the source voltage in proportion to the values

[#]

If a 1 k

and a 2 k

resistor are parallel-connected across a 12 V supply, how much current is received by the 2 k

resistor?

4 mA

6 mA

8 mA

12 mA

[#]

Increasing the number of magnetic poles in a basic generator will ___.

increase the generator's output voltage amplitude

increase the generator's output frequency

decrease the generator's output voltage amplitude

decrease the generator's output frequency

[#]

How is ac current related to ac voltage in a purely capacitive circuit?

AC current is 0.707 of the ac voltage.

AC current lags ac voltage.

AC current is 0.637 of the ac voltage.

AC current leads ac voltage.

[#]

___ capacitors have the highest values of capacitance.

Electrolytic

Ceramic

Plastic-film

Mica

[#]

If the resistor drops 6 V and the capacitor drops 8 V in a series RC circuit, the source voltage equals 10 V.

True

False

[#]

10.

In a series RC circuit, the phase difference between the current and the source voltage _____.

depends on the values of R and C

equals 0°

equals 90°

depends on the amplitude of the input voltage

[#]

11.

______________ is shuttled back and forth between the source and load.

True power

Reactive power

Apparent power

Impedance power

[#]

12.

As a generator armature passes the 270 degree point, the induced voltage is:

at maximum negative

between maximum negative and zero

at maximum positive

between zero and maximum positive

[#]

13.

What is the power dissipated in the primary of the transformer in the given circuit?

25 mW

500 mW

12.5 W

62.5 W

[#]

14.

Decreasing the gain in the given circuit could be achieved by

reducing the amplitude of the input voltage

increasing the value of the feedback resistor

increasing the value of the input resistor

removing the feedback resistor

[#]

15.

Switching voltage regulators have ______ than linear regulators.

longer life

simpler circuitry

greater efficiency

lower cost

[#]

16.

Resistivity is measured in cmil.Ω/ft.

True

False

[#]

17.

The output current capability of a single 7400 NAND gate when HIGH is called _____________.

source current

sink current

I_OH

source current or I_OH

[#]

18.

What is the next step after discovering a faulty gate within an IC?

repair the gate

resolder the tracks

replace the IC involved

recheck the power source

[#]

19.

A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?

AND or OR gates

XOR or XNOR gates

NOR or NAND gates

AND or NOR gates

[#]

20.

The relative accuracy of a digital-to-analog converter (DAC) is determined by settling time.

True

False

[#]

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers

Online Electronics Test - Electronics Test 8

Marks : 2/20

Test Review : View answers and explanation for this test.

Current Affairs

Interview Questions

Group Discussions