Online Electronics Test - Electronics Test 7

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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If an electrical system is compared to a fluid system, the electrical current corresponds to the:

pressure

pump

water wheel

water flow

[#]

___ is a better way of expressing 7,500,000 W.

7.5 kW

7,500 MW

7,500 GW

7.5 MW

[#]

What would these meter readings indicate about the circuit in the given circuit?

Meter Readings: I = 10 mA, V = 12 V

R₁ is open.

R₂ is open.

The fuse is open.

The circuit is operating normally.

[#]

Series components in a series–parallel circuit may be in series with other _______________ components, or with other _______________ components.

individual, combinations of

series, parallel

parallel, series

shunt, parallel

[#]

What is the fourth harmonic of a fundamental frequency of 400 Hz?

100 Hz

4 kHz

4 Hz

1.6 kHz

[#]

A 1 Hz sine wave has a period of 1 s.

True

False

[#]

Counter emf or induced voltage is:

inversely proportional to the change in current

directly proportional to the change in time

directly proportional to the inductance in henrys

inversely proportional to the inductance in henrys

[#]

The bandwidth of a filter is the range of frequencies between the half-power frequencies.

True

False

[#]

The ______ of a circuit describes the ability of that circuit to respond to certain frequencies while rejecting all others.

bandwidth

selectivity

sensitivity

quality factor

[#]

10.

The ratio between differential gain and common-mode gain is called:

amplitude

differential-mode rejection

common-mode rejection

phase

[#]

11.

Refer the given circuits. Which circuit is known as an OTA?

[#]

12.

A basic sample-and-hold circuit consists of an analog switch, a capacitor, and an instrumentation amplifier.

True

False

[#]

13.

How many basic types of resistors exist?

[#]

14.

What voltage will an ac voltmeter display?

rms

average

peak

peak-to-peak

[#]

15.

In an n-channel JFET, what will happen at the pinch-off voltage?

the value of V_DS at which further increases in V_DS will cause no further increase in I_D

the value of V_GS at which further decreases in V_GS will cause no further increases in I_D

the value of V_DG at which further decreases in V_DG will cause no further increases in I_D

the value of V_DS at which further increases in V_GS will cause no further increases in I_D

[#]

16.

Most of the input signals applied to a computer for storage or processing are digital in nature.

True

False

[#]

17.

The general function of a decoder is to activate one or more circuit outputs upon detection of a particular digital state.

True

False

[#]

18.

To operate correctly, starting a ring counter requires:

clearing all the flip-flops

presetting one flip-flop and clearing all the others

clearing one flip-flop and presetting all the others

presetting all the flip-flops

[#]

19.

A digital-to-analog converter (DAC) is said to be nonmonotonic if the magnitude of the output voltage increases every time the input code increases.

True

False

[#]

20.

The register in the 8085 microprocessor that is used to keep track of the memory address of the next opcode to be run in the program is the ________.

stack pointer

program counter

instruction pointer

accumulator

[#]

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Online Electronics Test - Electronics Test 7

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