Make your own quiz Manage my Quizzes Plans / Features Guides and Help Contact Privacy & Security

ELECS Coaching 1

A sleek, modern electronics laboratory with various electronic components, circuits, and devices in use, showcasing the principles of electronics in action.

Master the Basics of Electronics

Welcome to the ELECS Coaching 1 Quiz, designed for enthusiasts and professionals in the field of electronics. This comprehensive quiz consists of 101 challenging questions that cover a wide range of topics, from semiconductor physics to PLC programming.

Test your knowledge and understanding with questions including:

Semiconductor principles
Electrical fields and conduction
PLC programming techniques
Electricity and magnetism fundamentals

101 Questions25 MinutesCreated by ElectrifyingWave512

The bandgap of silicon at room temperature is:

A. 1.3 eV

B. 1.1 eV

C. 0.7 eV

D. 1.4 eV

Both the conduction and displacement current densities coexist in

A. Only conductors in air

B. Only dielectrics in air

C. Conductors placed in any dielectric medium

D. Never coexist

While performing read operation, one must take care that much current should not be

A. Sourced from data lines

B. Sinked from data lines

C. Sourced or sinked from data lines

D. Sinked from address lines

The static error band of a recording instrument signifies:

A. The accuracy of the instrument

B. The error produced when the pen is stopped at some deflection

C. The error introduced in low varying inputs

D. The irrepeatibility of the instrument

In a p + n junction diode under reverse biased the magnitude of electric field is maximum at:

A. The edge of the depletion region on the p - side

B. The edge of the depletion region on the n - side

C. The p + n junction

D. The center of the depletion region on the n - side

Consider the two-transistor analogy of SCR, if α1 and if α2 are the common-base current gains of both the transistor then turn-on the device:

A. α1 + α2 should approach zero

B. α1 x α2 should approach unity

C. α1 - α2 should approach zero

D. α1 + α2 should approach unity

Di/dt protection is provided to the thyristor by:

A. Connecting an inductor in parallel across the load

B. Connecting an inductor in series across the load

C. Connecting an inductor in parallel across the gate terminal

D. Connecting an inductor in series across the gate

The concentration of minority carries in an extrinsic semiconductor under equilibrium is:

A. Directly proportional to doping concentration

B. Inversely proportional to doping concentration

C. Directly proportional to intrinsic concentration

D. Inversely proportional to intrinsic concentration

In memory-mapped scheme, the device are viewed as

A. distinct I/O devices

B. Memory locations

C. Only input devices

D. Only output devices

What is the location of the internal registers of CPU?

A. Internal

B. On-chip

C. External

D. Motherboard

The line integral of the electric field intensity is

A. Mmf

B. Emf

C. Electric potential

D. Magnetic potential

Higher the magnitude of the gate pulse:

A. Lesser is the time required to inject the charges

B. Greater is the time required to inject the charges

C. Greater is the value of anode current

D. Lesser is the value of anode current

If the current sensitivity of a galvanometer is increased, the voltage sensitivity:

A. Decrease

B. Increase

C. Remains unaltered

D. May increase or decrease

In good conductors, the electric and magnetic fields will be:

A. 45 in phase

B. 45 out of phase

C. 90 in phase

D. 90 out of phase

P-I-N photoreceiver based on HEMT is integrated with ____ guiding layers.

A. GaAs and InP

B. GaAs

C. InGa

D. InGaAsP

A current of 10A is flowing through a circuit. The power factor is 0.5 lagging. The instantaneous value of the current can be written as:

A. I = 10 sin 60❰ A

B. I = 10 sin(ωt - 30❰) A

C. I = 14.14 sin (ωt - 60❰) A

D. I = 14.14 sin (ωt + 60❰) A

Clipper circuit is also known as:

A. limiter

B. slicer

C. Amplitude selector

D. All are correct

State box without decision and conditional box is:

A. Algorithmic State Machine (ASM)

B. Defined block

C. Simple block

D. Both A and B

The time varying electric field is

A. E = -∇V D. E = -∇V - D

B. E = -∇V – A

C. E = -∇V - B

D. E = -∇V - D

The N(S) becomes ____ when s is equal to any of the poles

A. ∞

B. 0

C. 1

D. 2

The difference between online and offline PLC programming is…

A. Whether the PLC is running or stopped

B. Whether the programming PC has internet connectivity

C. The type of programming cable used

D. Where the edited program reside

The Programmable Unijunction Transistor (PUT) turns on & starts conducting when the:

A. Gate voltage exceeds anode voltage by a certain value

B. Anode voltage exceeds gate voltage by a certain value

C. Gate voltage equals the anode voltage

D. Gate is given negative pulse w.r.t. To cathode

In PLC programming, a retentive function is one that:

A. Defaults to the “on” state

B. Comes last in the program

C. Defaults to the “off” state

D. Is not reset after a power cycle

The current in a metal at any frequency is due to

A. Conduction current

B. Displacement current

C. Both conduction and displacement current

D. Neither conduction nor displacement

What directive specifies the end of execution of a program?

A. End

B. Return

C. Stop

D. Terminate

Optical interconnection between optoelectronic device is achieved in:

A. Wavelength amplifier

B. Wavelength convertor

C. Replication technology

D. Chip-to-chip interconnection

A good application for a timed interrupt in a PLC program would be:

A. A communications function block

B. A PID function block

C. A math function block

D. A motor start/stop rung

In AVR, which of the following registers are there for the I/O programming of ports?

A. PIN

B. DDR

C. PORT

D. All of the mentioned

Find the conductivity current density when conductivity of a material is 500 units and corresponding electric field is 2 units.

A. 500

B. 250

C. 1000

D. 2000

Instructions which won’t appear in the object program are called as ____.

A. Redundant instructions

B. Exceptions

C. Comments

D. Assembler Directives

Which of the following steps have to be followed for interfacing a sensor to a microcontroller 8051?

A. Interfaces sensor with ADC and ADC with 8051

B. Interface sensor with the MAX232, send now to microcontroller, analyze the results

C. Make the appropriate connections with the controller, ADC conversion, analyze the results

D. None of the above

The directive used to perform initialization before the execution of the code is ____.

A. Reserved

B. Store

C. Dataword

D. EQU

Historically, central systems were used because:

A. Semiconductors memory was not available

B. Memory was very expensive

C. Memory consumed a large amount of power

D. All of the choices

What directive is used to specify and assign the memory required for the block of code?

A. Allocate

B. Assign

C. Set

D. Reserve

The type of communication in which the pulse to turn off the SCR is obtained by separate voltage source is:

A. class B commutation

B. class C commutation

C. class D commutation

D. class E commutation

When dealing with the branching code the assembler ____.

A. Replaces the target with its address

B. Does not replace until the test condition

C. Finds the Branch offset and replaces the Branch target with it

D. Replaces the target with the value specified by the DATAWORD directive

The assembler stores all the names and their corresponding values in:

A. Special purpose Register

B. Symbol Table

C. Value Map

D. None of the above

The assembler stores the object code in:

A. Main memory

B. Cache

C. RAM

D. Magnetic disk

The utility program used to bring the object code into memory for execution is ____.

A. loader

B. fetcher

C. extractor

D. linker

Time proportional control:

A. Can be used on a PM550 programmable process controller

B. Is less efficient than normal PID control

C. Cannot use a TM990 microcomputer

D. Both A and B above

In a single pulse semi-converter using two SCRs, the triggering circuit must produce:

A. Two firing pulses in each half cycle

B. One firing pulse in each half cycle

C. Three firing pulses in each cycle

D. One firing pulse in each cycle

The device-status table contains:

A. each I/O device type

B. each I/O device address

C. each I/O device state

D. All of the mentioned

In a 3-phase full converter using six SCRs, gating circuit must provide

A. One firing pulse every 30❰

B. One firing pulse every 90❰

C. One firing pulse every 60

D. Three firing pulse per cycle

For a type 2 system, the steady-state:

A. Error for a step input is always zero

B. Error for a velocity input is always zero

C. Input for acceleration input is always non-zero

D. All of the choices

In the complete firing circuit, the driver circuit consists of:

A. Pulse generator and power supply

B. Gate leads and power supply

C. Pulse amplifier and pulse transformer

D. Pulse detector and pulse amplifier

In the complete firing circuit, the driver circuit consists of:

A. Pulse generator and power supply

B. Gate leads and power supply

C. Pulse amplifier and pulse transformer

D. Pulse detector and pulse amplifier

The program execution time:

A. Must be slower than the fastest mechanical operation that is to be controlled

B. Will vary depending on the language used

C. Cannot be changed once the program is written

D. All of the choices

I/O hardware contains:

A. Bus

B. Controller

C. I/O port and its registers

D. All of the mentioned

Find the average gate power dissipation (Pgav) when the maximum allowable gate power dissipation (Pgm) = 10kW, with a duty cycle = 50 %

A. 10 kW

B.5 kW

C. 2.5 kW

D. 7 kW

Any electronic holding place where data can be stored and retrieved later whenever required is ____.

A. memory

B. drive

C. disk

D. circuit

Find the triggering frequency when the average gate dissipation = 0.3 W and the peak gate drive power is 5 Watts. The gate source has a pulse width of 20 𝜇sec duration.

A. 3 kHz

B. 0.3 kHz

C. 30 kHz

D. 0.03 kHz

The duty cycle can be written as:

A. fxT

B. f/T

C. T/f

D. f

It is to be noted that T = pulse width whereas f = (1/T1) = frequency of firing or pulse repetition rate. The chip 74LS245 is:

A. Bidirectional buffer

B. 8-bit input port

C. One that has 8 buffers

D. All of the mentioned

The assembler directive EQU, when used in the instruction: Sum EQU 200 does:

A. Finds the first occurrence of Sum and assigns value 200 to it

B. Replaces every occurrence of Sm with 200

C. Re-assigns the address of Sum by adding 200 to its original address

D. Assigns 200 bytes of memory starting the location of Sum.

Find the range of band gap energy for conductors.

A. >6 eV

B. 0.2-0.4 eV

C. 0.4-2 eV

D. 2-6 eV

The magnitude of gate voltage and gate current for triggering an SCR is:

A. Inversely proportional to the temperature

B. Directly proportional to the temperature

C. Inversely proportional to the anode current requirement

D. Directly proportional to the anode current requirement

The coefficients of the polynomials P (S) and Q (S) in the network function N (S) are ____ for passive network.

A. Real and positive

B. Real and negative

C. Complex and positive

D. Complex and negative

A universal logic gate is one which can be used to generate any logic function. Which of the following is a natural logic state?

A. OR

B. AND

C. XOR

D. NAND

Which of the following connects high-speed high-bandwidth device to memory subsystem and CPU?

A. Expansion bus

B. PCI bus

C. SCSI bus

D. None of the mentioned

If the loss tangent is very less, then the material will be a:

A. Conductor

B. Lossless dielectric

C. Lossy dielectric

D. Insulator

For conductors, the free electrons will exist at

A. Valance band

B. Middle of valence and conduction band

C. Will not exist

D. Conduction band

In case of a cosine firing scheme, ____ is used to get a cosine wave.

A. IC 555

B. A comparator

C. An integrator circuit

D. A differentiator circuit

Clamper clamps the ____ peak at the zero volt.

A. positive

B. negative

C. A and B are correct

D. All are correct

Which hardware triggers some operations after certain programmed count?

A. Programmable interval timer

B. Interrupt timer

C. Programmable timer

D. None of the mentioned

The natural reversal of ac supply voltage commutates the SCR in case of:

A. Forced commutation

B. Only line commutation

C. Only natural commutation

D. Both line and natural commutation

Calculate the convection current when electron density of 200 units is travelling at a speed of 12 m/s.

A. 16.67

B. 2400

C. 2880

D. 0.06

The data-in register of I/O port is:

A. Read by host to get input

B. Read by controller to get input

C. Written by host to send output

D. Written by host to start a command

Device drivers are implemented to interface:

A. Character devices

B. Block devices

C. Network devices

D. All if the mentioned

Conduction

A. Electrons only

B. Electrons and holes

C. Holes only

D. Applied electric field

A process is moved to wait queue when I/O request is made with ____.

A. non-blocking I/O

B. blocking I/O

C. asynchronous

D. synchronous

The output of a logic gate is 1 when all the inputs are at logic 0 as shown below: The gate is either:

A. A NAND or an EX-OR

B. An OR or an EX-NOR

C. An AND or an EX-OR

D. A NOR or an EX-NOR

The following switching functions are to be implemented using a decader: f1=Σm(1,2,4,8,10,14) f2=Σm(2,5,9,11) f3=Σm(2,4,5,6,7) The minimum configuration of decoder will be:

A. 2 to 4 lines

B. 3 to 8 lines

C. 4 to 16 lines

D. 5 to 32 lines

If the number of zeros (n) are greater than the number of poles (m), then there will be ____ number of zeros at s = ∞.

A. n

B. m

C. n-m

D. n+m

The latch or IC 74LS373 acts as:

A. Good input port

B. Bad input port

C. Good output port

D. Bad output port

A full adder logic circuit will have:

A. Two inputs and one output

B. Three inputs and three outputs

C. Two inputs and two outputs

D. Three inputs and two outputs

A positive clamper adds:

A. positive DC level

B. negative DC level

C. AC level

D. A and B are correct

Which of the following are known as universe gate?

A. NAND & NOR

B. AND & OR

C. XOR & OR

D. EX-NOR & XOR

FORTRAN is:

A. Machine dependent

B. A medium-level language

C. A mathematically oriented language

D. All of the choices

The alternate way of writing the instruction, ADD #5, R1 is ____.

A. ADD [5], [R1]

B. ADDI 5, R1;

C. ADDIME 5, [R1];

D. There is no other way

If the poles or zeros are not repeated, then the function is said to be having ____ poles or ____ zeros.

A. simple, multiple

B. multiple, simple

C. simple, simple

D. multiple, multiple

By equating the denominator of transfer function to zero, which among the following will be obtained?

A. Poles

B. Zeros

C. Both poles and zeros

D. None of the above

By equating the denominator of transfer function to zero, which among the following will be obtained?

A. Poles

B. Zeros

C. Both poles and zeros

D. None of the above

Ergonomics refers to:

A. The human aspect of environment around the workstation as well as the workstation itself

B. The cost relationship of the workstation versus productivity

C. The level of involvement the operator has with the workstation

D. The technology involved in the workstation itself

Which buffer holds

A. spool

B. Output

C. Status

D. Magic

R81 = 3 kΩ and R82 = 6 kΩ. Find the intrinsic stand-off ratio (η) of the UJT.

A. 9

B. 1/3

C. 2/3

D. 3

When hardware is accessed by reading and writing to the specific memory locations, then it is called ______.

A. port-mapped I/O

B. controlled-mapped I/O

C. bus-mapped I/O

D. None of the mentioned

Which of the following is correct about BRNE instruction in AVR microcontroller?

A. It is used to jump to the given mentioned label when the zero flag accounts to 0

B. It is used to check the zero flag

C. It is used to compare two registers

D. It is used to compare two values

A common way to take x, y coordinates off a drawing is to use a

A. Light pen

B. Digitizer

C. Direct view storage tube (DVST)

D. Tablet

The TRIAC’s terminals are:

A. gate, anode, cathode

B. MT1, MT2, gate

C. gate1, gate2, anode, cathode

D. MT1, MT2, gate1, gate2

Which CAD display configurability allows work without any host support?

A. Highly intelligent

B. Medium intelligence

C. Low intelligence

D. One with no secondary storage capacity

Maxwell’s equations give the relations between

A. Different fields

B. Different sources

C. Different boundary conditions

D. None of the above

When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity?

A. 1

B. 2

C. 0

D. Equal to number of zeroes

If the RC firing circuit used for firing an SCR is to be used to fire a TRIAC then

A. The capacitor should be removed

B. The diode should be replaced by a diac

C. The diode should be replaced by bjt

D. The diode should be shorted using a resistor

The two-transistor model of the SCR can be obtained by:

A. Bisecting the SCR vertically

B. Bisecting the SCR horizontally

C. Bisecting the SCRs top two & bottom two layers

D. Bisecting the SCRs middle two layers

Find the band gap energy when a light of wavelength 1240 nm is incident on it.

A. 1 eV

B. 2 eV

C. 3 eV

D. 4 eV

Alternating current measured in a transmission line will be

A. Peak value

B. Average value

C. RMS value

D. Zero

What is the internal Vref of an Atmega32 series?

A. 3.3 V

B. 2.56 V

C. 5 V

D. All of the mentioned

The instructions like MOV or ADD are called as:

A. OP-Code

B. Operators

C. Commands

D. None of the mentioned

The code where all successive numbers differ from their preceding number by single bit is:

A. Alphanumeric Code

B. BCD

C. Excess 3

D. Gray

Which among the following anode current waveforms will have the minimum junction temperature?

A. 100% DC

B. 25% DC

C. 50% DC

D. AC

REVIEW IT BABY

{"name":"ELECS Coaching 1", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"Welcome to the ELECS Coaching 1 Quiz, designed for enthusiasts and professionals in the field of electronics. This comprehensive quiz consists of 101 challenging questions that cover a wide range of topics, from semiconductor physics to PLC programming.Test your knowledge and understanding with questions including:Semiconductor principlesElectrical fields and conductionPLC programming techniquesElectricity and magnetism fundamentals","img":"https:/images/course2.png"}