This is the Section 5 Module 4 of the compiled Electronics Coaching Materials taken from different sources including but not limited to Electronics books, past Board Exams Questions, Journals and other Electronics References. This particular Coaching Notes in Electronics Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Electronics Engineering Coaching: Section 5 Module 4
ยท Lead acid does not depend on:
Ans: Rate of charge
ยท Lead acid consists of:
Ans: Dilute sulfuric acid, sponge lead, and lead peroxide
ยท Conputer on a chip is called:
Ans: Transputer
ยท Transputer consists of
Ans: 32 bits
ยท Nibble consists of ____ bits.
Ans: 4
ยท OP amp has a gain of approximately
Ans: 1,000,000
ยท The voice coil has an impedance between
Ans: 4 and 100 ohms.
ยท Semiconductor have ____ bonds.
Ans: covalent
ยท Nimak gantry robot has
Ans: good precision positioning
ยท Sulphation in a lead acid cell is
Ans: to incompletely charging
ยท Nickel cadmium can be charged or discharged because
Ans: water is neither absorbed or formed.
ยท Daisy chaining
Ans: method used in determining interrupt priorities in a microcontroller.
ยท Who coined the term robot?
Ans: Karel Capek
ยท LASER is classified as
Ans: monochromatic. Coherent and collimator.
ยท 555 timer consists of
Ans: astable, monostable and VCO
ยท Early effect is also called
Ans: base width modulation
ยท The effect produced due to flow of electrons and holes
Ans: drift current
ยท Process of adding impurities in the intrinsic semiconductor
Ans: Doping
ยท What is reduced by using bundled conduction?
Ans: Power loss due to corona.
ยท ________ is also called modified Maxwell Wien bridge.
Ans: Anderson bridge.
ยท ________ is a bridge that compares the capacitance of the capacitor.
Ans: De Soutry bridge
ยท It measures unkonown inductance in terms of resistance and capacitance.
Ans: Anderson bridge
ยท An IC consists of passive devices.
Ans: Film IC
ยท SI unit of luminous intesnisty
Ans: Candela
ยท SI unit of illuminance
Ans: Lux
ยท A microwave diode that has a frequency range of 10-1000 GHZ
Ans: IMPATT diode
ยท A microwave diode in the negative resistance region.
Ans: PIN diode
ยท Schmitt trigger acts like a
Ans: Latch
ยท Fermi level is in the
Ans: Forbidden gap
ยท Invalid NAND flip-flop violation
Ans: S=0 C=0
ยท Invalid NOR flip-flop violation
Ans: S=1 C=1
ยท Range of depletion width
Ans: 0.5 and 1 um
ยท Impedance matching
Ans: Transformer coupling and emitter follower.
ยท Maxwell-Wien bridge measures
Ans: Inductance
ยท D flip-flop consists of
Ans: JK flip-flop, RS flip-flop and inverter
ยท Uses binary counters
Ans: D flip-flop
ยท Ideal CMRR
Ans: Infinity
ยท SCARA uses ____ operation
Ans: Assembly
ยท Gold doping has an advantage of
Ans: Reduced storage time.
ยท It is the time for the diode to be forward biased to off time
Ans: Reverse recovery time
ยท The reverse current doubles in every ___ ยฐC increase in temperature.
Ans: 6
ยท LASER and LED are in what spectrum?
Ans: Infrared spectrum.
ยท GaAs is used for
Ans: Infrared light or invisible light
ยท Tapped coil oscillator
Ans: Hartley
ยท Tickler coil oscillator
Ans: Armstrong
ยท Tapped capacitor oscillator
Ans: Colpitts
ยท The sediment that allows the bottom of the lead acid cell
Ans: Antimony Lead alloy
ยท Two transistors in class B is in
Ans: Push-pull
ยท Photodarlington consists of
Ans: Transistor and phototransistor
ยท Largest voltage applied without irreversible damage
Ans: PIV
ยท Thermal neutron is also called _____ neutron.
Ans: Slow
ยท Avalanche breakdown is due to
Ans: collision
ยท One nibble consists of
Ans: 4 bits
ยท Large computer has a maximum of
Ans: 64 bits
ยท Card readers can read about
Ans: 10.000 cards per minute
ยท Advantage of ECL
Ans: Lowest propagation delay
ยท Schottky TTL has
Ans: Least propagation delay
ยท Main advantage of CMOS
Ans: Low power
ยท CC voltage gain
Ans: cannot be exceeded to unity.
ยท Largest voltage applied without irreversible damage
Ans: PIV
ยท Transputer operates in
Ans: parallel data
ยท It is an IC consist of passive and active devices
Ans: Monolithic IC
ยท It is an IC consist of passive devices
Ans: Film
ยท Discrete circuit
Ans: Digital circuit
ยท Linear circuit
Ans: Analog circuit
ยท Backhausen criterion is a condition that
Ans: stops oscillating
ยท Negative output swing occurs
Ans: near saturation
ยท Positive output swing occurs
Ans: towards cut-off
ยท When dry cell is charged,
Ans: It increased in volume
ยท Class C acts
Ans: as an RF amplifier
ยท Crystal uses
Ans: RF transmitter
ยท A class of amplifier that has 85% efficiency
Ans: Class C
ยท With Si, Z=14, it is
Ans: Half-filled
ยท Formation of Si in valence shell
Ans: 2, 8, 4
ยท Volatile memory is
Ans: Semiconductor ROM
ยท Semiconductor ROM is
Ans: Combinational Logic circuit
ยท EPROM erases when strikes by
Ans: Ultraviolet rays
ยท Bolometer acts like a
Ans: Thermistor
ยท Ondograph is
Ans: A waveshape of voltage and current.
ยท Nickel iron cell consists of
Ans: NiOH, powdered iron and its oxide and 21% of potassium.
ยท CE is
Ans: Phase reversal
ยท Photoconductive cell is also called
Ans: photoresistive cell
ยท The smallest of all h parameter is
Ans: hO
ยท The formula of h11 is
Ans: V1/I1
ยท The h parameter consists of
Ans: Construction, operating point and temperature
ยท Moving coil occurs in
Ans: DC
ยท VTVM internal resistance is
Ans: the highest internal resistance
ยท It measures magnetic properties of ferromagnetic
Ans: Permeameter
ยท Simple RL low pass measures -12 dB/octave, corresponds to ___ dB/decade
Ans: -40
ยท Rotational joins of the robot is called _____
Ans: Revolute joints.
ยท Straight line joints movement of the robot is called
Ans: Prismatic joints
ยท Input and output point
Ans: Handshaking
ยท RL high pass filter has a phase difference of
Ans: 45 degrees
ยท Who invented the microprocessor in 1969?
Ans: Ted Hoff
ยท Who invented the 1st IC?
Ans: Jack Kilby
ยท dI/dt of an SCR is
Ans: local hot spot
ยท 3 ยฝ display maximum reading
Ans: 0999
ยท 3 ยฝ 1 mV reading
Ans: 1000
ยท Straight line method
Ans: piecewise linear method
ยท Improper biasing of IC
Ans: causes distortion
ยท One kWh of energy is equivalent to
Ans: 860 kcal
ยท Junction breakdown occurs in
Ans: reverse bias
ยท Ratio of Ah and Wh is
Ans: greater than one.
ยท The capacity in a cell is measured in
Ans: Ah
ยท In the IC, the SiO2 layer is
Ans: isolation
ยท A V/I characteristic curve is
Ans: Boltzman diode characteristic.
ยท Early effect is also called
Ans: base width narrowing.
ยท Advantage of Swinburneโs test is
Ans: very convenient and very economical.
ยท An IC consists of ceramic substrate
Ans: thin film IC
ยท An IC consists of alumina substrate
Ans: thick film IC
ยท It is the development of a traverse electric field in a solid material when it carries an electric current
Ans: Hall effect
ยท It is used when the input signal has periodically occurring intervals in which the input waveform is quiescent
Ans: synchronized clamping
ยท A circuit that produces an output only when first activated by a preliminary pulse
Ans: sampling gate
ยท Successive trigerring signal induces a transition regardless of the state in which binary happens to be
Ans: symmetrical triggering
ยท Both carrier drift and carrier diffusion depend on ___
Ans: Einstein relation
ยท Microprogramming is
Ans: A technique to implement the control logic necessary to execute instructions within a processor.
ยท It is used to measure a speed by cutting off light at a regular interval
Ans: Stroboscope
ยท Thermal runaway is
Ans: is an electrochemical reaction that causes a battery to heat and possibly explode.
ยท A kind of ROM that degrades its own memory contents as the memory is read
Ans: EAROM
ยท An inductor operates at 400 Hz
Ans: Toroidal core
ยท An inductor operates at 95 MHz
Ans: Air core
ยท Data bus
Ans: It is data lines in a system bus.
ยท In converting intrinsic into N-type extrinsic semiconductor, which element cannot be used?
Ans: Indium
ยท Pin resistor has industrial heating in
Ans: Hairpin form
ยท Any solid object has ___ degrees of freedom
Ans: 6
ยท Flip-flop as a latch
Ans: S-C flip flop
ยท PIN diode
Ans: A microwave diode frequencies up to GHz range.
ยท Ip/Iv of a tunnel diode is used in
Ans: Computer application
ยท Noise figure of MMIC (Monolithic Microwave Integrated Circuit)
Ans: 3.5 to 6 dB
ยท Unique advantage feature of CMOS
Ans: Power in a nanowatt range
ยท Any charge in a battery when taken off the vehicle
Ans: Bench charge
ยท LASCR acts like a
Ans: Latch
ยท A word has
Ans: 16-bit length
ยท A double word has
Ans: 32-bit length
ยท A company who invented the word byte
Ans: IBM
ยท Degrees of freedom is the number of ______ independent movements including the end effector
Ans: independent
ยท An inductor operates at 400 Hz
Ans: Toroidal core
ยท Percentage loss of the dc wound machine
Ans: 1 %
ยท When dc voltage is removed, the clamper acts as a
Ans: Rectifier
ยท CMOS has extremely
Ans: Large packing density
ยท Solar cell has a principle of
Ans: Photovoltaic cell
ยท Sensor that detects change in resistance in extrinsic semiconductor
Ans: Spreading Resistance Sensor (SRS)
ยท Reduce the stray capacitance and capacitance between bridge arm by grounding
Ans: Wagner Grounding
ยท A meter sensitivity control in a test instrument
Ans: Linear Taper Potentiometer
ยท A volume control in a stereo compact disc player
Ans: Logarithmic Taper Potentiometer
ยท Faster in retrieval and storage compared to magnetic tape
Ans: Magnetic Disk
ยท It has more ripple in a bandpass and cut-off frequency
Ans: Chebyshev filter
ยท Darlington pair of transistors is _____ by Beta factor.
Ans: multiplied
ยท CCD has ___ transfer electrons
Ans: 6
ยท Neutral logic
Ans: Trinary logic
ยท Totally true, totally false
Ans: Fuzzy logic
ยท Which is not a factor of capacitance?
Ans: Plate thickness
ยท Ideal input impedance of an op-amp
Ans: Very high
ยท Ideal output impedance of an op-amp
Ans: Very low
ยท With 100 ฮฉ to match with higher input impedance, the configuration is
Ans: Common base
ยท Optocoupler consists of an
Ans: LED and phototransistor
ยท Optoisolator consists of an
Ans: LED and phototransistor
ยท Positive feedback
Ans: Oscillator
ยท Phase locked loop
Ans: Frequency discriminator, FM detector
ยท Air as inductor core has
Ans: Greatest efficiency
ยท What increases noise immunity in op-amp?
Ans: Hysteresis
ยท Resisitve element
Ans: Horizontal axis
ยท Reactive element
Ans: Vertical axis
ยท Sine wave with all harmonics
Ans: Square wave
ยท It abruptly changes from 2 voltage leads
Ans: Square wave
ยท 63.2 %
Ans: One time constant
ยท A sine wave oscillator, sine wave circuit
Ans: Crystal
ยท Positive pulse on anode terminal
Ans: Turning on an SCS
ยท 3 phase rectifier that uses 6 rectifier element
Ans: Gratz rectifier
ยท What uses as marker of 100 kHz?
Ans: 2 flip-flops
ยท Feature of R-S to J-K flip-flop
Ans: Toggle
ยท LC balance bridge
Ans: Maxwell bridge
ยท Operator on microwave frequency
Ans: GaAs over Silicon or Germanium
ยท J-K flip-flop frequency
Ans: Divides the frequency by 2.
ยท Small capacitance formed by twisting 2 insulated wire
Ans: Gimmick Capacitor
ยท Modified Miller circuit
Ans: Phanastron
ยท Converts step to ramp circuit
Ans: Miller circuit
ยท Servocontrolled robots are robots within ___ mm range rather than a fraction of mm.
Ans: 2
ยท It is an electron tube which emits photoelectrons when the cathode is eliminated
Ans: Phototube
ยท It is a radiant energy absorbed by the radiant to incident energy
Ans: Absorptance
ยท Inventor circuit
Ans: Converts dc to ac circuit
ยท Laurence or Living stone
Ans: Magnetic resonator or cyclotron
ยท Microporgramming
Ans: Sequence of five binary codes
ยท 540 degrees
Ans: Phase opposition
ยท Power efficiency of solar cell
Ans: 5% to 15%
ยท Thermal detector
Ans: Bolometer
ยท Exact location of data
Ans: Absolute code
ยท Fundamental frequency in all harmonics
Ans: Sawtooth wave
ยท dV/dt of SCR
Ans: False trigerring
ยท Monolithic IC uses
Ans: Extensive large components
ยท MOS IC uses
Ans: MOSFET
ยท A diode with no depletion region
Ans: Schottky diode
ยท LED emits light because
Ans: Electron and holes recombine
ยท What is the difference on the input impedance of BJT and FET?
Ans: A FET has high input impedance while BJT has low input impedance.
ยท Marking of scale to accept standard
Ans: Calibration
ยท Zener diode is in
Ans: reverse diode
ยท The temperature coefficient of extrinsic semiconductor is
Ans: negative
ยท Voltage of selenium semiconductor
Ans: 1 V
ยท It is preferred to manufacture diode and temperature rating
Ans: Silicon
ยท Isotope โฆ
Ans: Abundance ratio
ยท Electron hole pair is done by
Ans: Thermal energy
ยท JFET square law device is because
Ans: its characteristic curve is parabolic
ยท Tank circuit
Ans: Antiresonant
Complete List of Electronics Engineering Coaching Materials
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