Tunnel Diode Question & AnswersFebruary 9, 2022 By WatElectronics This article lists 100 Tunnel Diode MCQs for engineering students. All the Tunnel Diode Questions and Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Tunnel Diode.A Tunnel diode is a type of PN diode designed by Tokyo scientist Leo Esaki in 1958. During this discovery of diode, Leo has observed the heavily doping condition to diode has generated negative based resistance. This generation of negative-based resistance has further reduced the current flow across the diode. This diode works on the principle of Tunneling also called the Quantum mechanical effect and its characteristics are plotted using VI characteristics in forward and reverse bias conditions.VI characteristics operate in 3 regions tunneling current, negative resistance, and valley point. A heavy doping-based condition is observed in forward bias condition of the tunnel diode. In reverse bias conditions, the diode acts as a fast rectifier. These diodes benefit in terms of switching property, minimum noise, less power dissipation, and generation of negative resistance. But limits in terms of cost, zero isolation between input and output, low output swing, and low power devices. The applications include oscillators, amplifiers, storage devices, etc.1). A tunnel diode is also called ____? Eskari diode PN diode Zener diode Pin diode HintIncludes scientists name.2). A tunnel diode is a ____ diode? Semi-conductor diode Conducting diode Insulating diode Both a and b HintP-type and N-type devices. Read more about Semiconductor.3). A tunnel diode is similar to ____ diodes operation? PN diode Zener diode Vactor diode PIN diode HintStandard diode.4). A tunnel diode has _____ polarity resistance? Positive Negative Neutral Both a and b HintInverting polarity.5). Due to _____ property tunnel diode experience tunneling? Quantum Mechanical Pressure Mechanical torque Both b and c HintA fundamental theory in physics.6). Quantum mechanic is related to _____ subject? Maths Physics Mechanics Science HintReal time subject.7). Quantum physics includes _____? Quantum theory Quantum Chemistry Quantum information science All the above Hint3 theories.8). A semiconductor diode has ___ number of substances? 1 2 3 4 HintEven number.9). In negative resistance concept, increase in voltage of a device leads to _____ in current quantity? Increase Decrease Zero Constant HintInversely proportional.10). Tunneling is a _____ phenomenon? Quantum Mechanical Quantum Physics Quantum Chemist Quantum Maths HintA physical phenomenon associated with the equilibrium or motion of objects.11). Tunnel diode was invented by ____ scientist? Leo Esaki Leo Tunnel James Esaki Both a and c HintTunnel diode was invented by Tokyo scientist.12). Tunnel diode is a ___ device? Passive Active Source independent Both b and c HintSource dependent.13). Tunnel diode works on ___ principle? Tunneling Collision Expansion Both a and c HintA protocol that allows for the secure movement of data from one network to another.14). Which of the following was the first production of tunneling diode? Sony Phillips Voltas LG HintA Japanese multinational conglomerate corporation .15). How many pins do a tunnel diode comprises of? 1 2 3 4 HintEven number.16). Identify the following diode type in the figure below?Diode Zener diode Tunnel diode PIN diode Varactor diode HintA negative resistance diode.17). A cathode is a ___ polarity? +ve –ve Inverted Both b and c HintElectron charge is?18). A anode is a ___ polarity? +ve –ve Inverted Both b and c HintHole carrier charge is?19). A tunnel diode has ____ doped PN junction? Lightly Heavily Moderately Zero HintMore concentration.20). A PN junction is also called_____ junction? Positive to negative Negative to positive Positive to positive Negative to negative HintNoninverting to inverting junction.21). A P-type semiconductor has ____ as majority carriers? Holes Electrons Neutrons Both a and c HintPositive polarity.22). A N-type semiconductor has ____ as majority carriers? Holes Electrons Neutrons Both a and c HintNegative charge.23). A heavy doping in tunnel diode has ____ band? Broken band gap Conduction band Valance band Zero band HintAlso called staggered band gap. Read more about Band.24). N-side in tunnel diode has ___ band? Broken band gap Conduction band Valance band Zero band HintTop most band energy.25). P-side in tunnel diode has ___ band? Broken band gap Conduction band Valance band Zero band HintLower most band energy.Tunnel Diode Interview Questions and Answers26). A band gap is a _____? Energy gap Zero energy gap Valance gap All the above HintA range in a solid where no electron states exist.27). Which of the following is the mid gap in an electron conduction? Conduction band Valance band Band gap All the above HintA minimum amount of energy required for an electron to break free of its bound state.28). Which of the following substance are used in a semiconductor device? Silicon Germanium Gallium All the above Hint3 substances.29). Which of the following are the applications of tunnel diode? Oscillator Amplifier Switching circuits All the above Hintsource dependent devices. Read more about Switching Circuits.30). The power output from a tunnel diode is ____? High Low Zero Infinite HintMinimum value.31). Which of the following device application of tunnel diode has step tunneling? MIIM diode Resonant tunneling diode RF diode All the above HintA device application of tunnel diode has step tunneling.32). Which of the following application of tunnel diode has highest frequency of an solid based oscillator? MIIM diode Resonant tunneling diode RF diode All the above Hintmeasures in Hertz.33). In forward bias of a tunnel diode the width of band is ____? Wider Thin Zero Both b and c HintLarger band size.34). In reverse bias of a tunnel diode the width of band is ____? Wider Thin Zero Both b and c HintRelatively close together.35). At negative differential resistance the value of current _____? Increases Decreases Zero Infinity HintInversely proportional.36). When ____ parameter increases beyond fixed transition point the tunnel diode conducts. Current Voltage Load Resistance HintMeasured using voltmeter.37). A tunnel diode in reverse bias is called ____? Back diodes Backward diodes Negative diode Both a and b Hint2 names38). In tunnel diode reverse bias condition the diode acts as fast _____? Rectifier Amplifier Oscillator Both a and b HintA device that converts an oscillating two-directional alternating current (AC) into a single-directional direct current (DC).39). Which of the following are the properties of Tunnel diode in reverse bias? Zero offset voltage Linearity of power Fast rectifier All the above Hint3 properties.40). Which of the following substance is mostly used in tunnel diode? Germanium Gallium Silicon Both b and c Hint2 substance.41). A high impurity based PN junction devices is called ____ diode? Tunnel diode Zener diode Vactor diode Pin diode HintNegative resistance diode.42). Which of the following is the formula for tunnel diode phenomenon? P α exp(-A*E_b*W) P - exp(-A*E_b*W) P + exp(-A*E_b*W) P = exp(-A*E_b*W) HintExponent power of terms.43). A tunnel diode has ___ body? Ceramic Non-ceramic Plastic Both b and c HintA various hard, brittle, heat-resistant and corrosion-resistant materials made by shaping and then firing an inorganic.44). Which of the following are the components of tunnel diode? Hermetically sealing based lid Tin dot Mesh screen All the above Hint3 components.45). The tin-dot in tunnel diode is connected to ____ terminal? Anode Cathode Positive Both a and b HintNegative polarity.46). The pellet component of tunnel diode is connected to ____? Anode Cathode Positive Both a and c HintNon-inverting terminal.47). How many bias modes are observed in a tunnel diode? 1 2 4 5 HintEven number.48). The characteristic operation of tunnel diode is _____ than tunnel diode? Same Zero Different Infinite HintVariable value.49). At ____ bias condition tunnel diode acts as fast rectifier? Forward Reverse Positive Negative HintOpposite polarity connection to diode. Read more about Rectifier.50). Which of the following state in tunnel diode empty states are present on ____ side aligned with filled states? P-side N-side PN-side NPN side HintElectrons as majority carriers.Tunnel Diode MCQs for Exams51). Which of the following is the filled state in tunnel diode? P-side N-side PN-side NPN side HintHoles as majority carriers.52). Which of the following is the un-filled state in tunnel diode? P-side N-side PN-side NPN side HintElectrons as majority carriers.53). In tunnel diode electrons tunnel through ____? Potential barrier Wall Charge carriers All the above HintA region in which particles are decelerated or stopped by a repulsive force.54). A tunnel diode with high concentration is a good _____? Conductor Semiconductor Insulator Both a and b HintElectron free movement substances. Read more about Conductor.55). A tunnel diode is represented using ____ characteristics? VI VR IR IVR Hint2 parameters.56). Which of the following parameter is plotted on X-axis of tunnel diode characteristics? Voltage Current Resistance Inductance HintA makes electric charges move.57). Which of the following parameter is plotted on Y-axis of tunnel diode characteristics? Voltage Current Resistance Inductance HintMeasures in amperes.58). The forward resistance in tunnel diode is _____ value? Maximum Minimum Zero Infinity HintLeast value.59). When voltage increases beyond peak based voltage the value of current _____? Increases Decreases Zero Constant HintInversely proportional.60). How many points are observed in an tunnel diode? 1 2 3 4 HintEven number.61). Which of the following is the equation of current component in tunnel diode? It = Itun + I diode + I excess It = Itun - I diode + I excess It = Itun + I diode - I excess It = Itun - I diode - I excess HintSum of terms.62). Due to which of the following reason current in tunnel diode raises? Parasitic tunneling Increase in load Increase in voltage All the above HintDependent tunneling diode,63). Which of the following is the value of output voltage of tunnel diode? 0.1 to 0.5 0.5 0.4 0.3 HintA range value.64). ____ are the maximum values of tunnel diode? Peak voltage Peak Current Peak resistance Both a and b Hint2 values.65). Which of the following voltage is maximum in tunnel diode? Cut in voltage Peak voltage Load voltage Both a and b HintA forward biased voltage at which large electric currents start to pass through the diode.66). _____ properties in tunnel diode is considered negligible? Excess current Diode current Load current Both a and b Hint2 properties.67). Which of the following is the minimum and maximum current equation of a diode? V=Vpeak V=o V= infinity All the above HintMaximum voltage value.68). Which of the following is the equation of a tunnel diode with negative resistance of a small signal based value? Rn= Ro + (1-(m*(V/Vo)m)*exp(-(V/Vo)^m)/R0 = 0 Rn= Ro - (1-(m*(V/Vo)m)*exp(-(V/Vo)^m)/R0 = 0 Rn= Ro + (1-(m*(V/Vo)m)*exp(-(V/Vo)^m)/R0 = 0 Rn * Ro/(1-(m*(V/Vo)m)*exp(-(V/Vo)^m)/R0 = 0 HintALU of 3 operators.69). Which of the following is the order of switching time of a tunnel diode? Nano seconds Pico seconds Micro seconds Both a and b Hint2 measuring units.70). Due to triple valued feature tunnel diode act as _____ device? Logic memory Register Switch Both a and b HintDevice that stores data.71). Which of the following conditions of a tunnel diode makes it work as a microwave oscillator? Small capacitance Small inductance Negative resistance All the above Hint3 conditions.72). Which of the following is the frequency of microwave oscillator? 10GHz 11GHZ 10MHz 12MHz HintEqual to 1,000 megahertz.73). A tunnel diode with negative resistance acts as _____? Oscillator Switch Amplifier Rectifier HintA circuit which produces a continuous, repeated, alternating waveform without any input. Read more about Oscillators.74). Which of the following is the advantage of tunnel diode? Low cost Enhance speed Minimum power All the above Hint3 advantages.75). Which of the following are the disadvantages of tunnel diode? Zero isolation property between input and output Operates between 0 and 1V Low swing in output voltage All the above Hint3 disadvantages.Tunnel Diode Quiz Questions and Answers.76). What is the width of PN junction in tunnel diode? 5nm 10nm 15nm 20nm HintOdd value.77). In ____ material tunneling is a incident based conduction? Conducting Semiconducting Insulating All the above HintP-type and N-type.78). In tunneling diode electrons flow in ___ region? Active Sat Depletion All the above HintA region where neither an excess of electrons nor of holes. Large depletion regions inhibit current flow.79). The doping capacity of a tunnel diode is ___? 1000 Greater than 1000 Lesser than 1000 100 HintGreater value.80). In which character a tunnel diode differs from pn diode? Doping density Terminals Conductance Application HintAdded impurities to semiconductor device.81). On ___ voltage application to tunnel diode band conversion takes place? 1V 0V 2V 5V HintMinimum value.82). On application of minimum voltage to tunnel diode ____ quantity of electrons flow across depletion region? Maximum Zero Infinity Minimum HintAbsence of electron.83). At ___ voltage condition in tunnel diode charge carriers are generated? Low High Zero Infinite HintMaximum value.84). When there is increase in voltage level the bands in tunnel diode____? Overlap Separates Divides All the above HintCombined band.85). Increase in conductor based voltage then tunnel current becomes _____? 0V 1V 2V 5V HintNo voltage.86). The bands ____ with increase in conductor voltage? Overlaps Not overlaps Breaks All the above HintMerges.87). Which of the following are the equivalent circuit components of a tunnel diode? Resistor Capacitor Inductor All the above HintPassive components.88). Which of the following is the resistance value of a resistor used in tunnel diode? 5 4 3 1 HintOdd value.89). Which of the following is the inductor value of a resistor used in tunnel diode? 0.5nH 0.2nH 0.1nH 0.3nH HintOdd value. Read more about Inductor.90). Which of the following is the capacitance value of a resistor used in tunnel diode? 5 to 100pF 4-100pF 50 to 100pF 100 to 1000 pF HintMinimum to maximum range.91). ____ is defined as the current flow via diode due to punching of electron across PN junction? Valley current Tunneling current Negative resistance characteristics Positive resistance characteristics HintA condition when electrons move through a barrier that they classically shouldn't be able to move through.92). A heavy doping condition occurs due to ___ condition? Forward bias Reverse bias Both a and b Zero bias HintOpposite polarity connection to diode.93). Which of the following are the components of a tunnel diode oscillator? Inductance Capacitance Internal resistance All the above HintPassive components,94). Resistance, Inductance and capacitance in an tunnel diode oscillator are connected in ____ configuration? Parallel Serial One after the another Both b and c HintConcurrent connection.95). At ___ condition the tunnel diode oscillator amplitude is blocked? Positive resistance Negative resistance Zero resistance None of the above HintNoninverted resistance.96). Which of the following is the formula for oscillation frequency of tunnel diode oscillator? F=1/2π [sqrt LC] F=1/2π [LC] F=1/π [sqrt LC] F=1/ [sqrt LC] HintMaximum parameters in formula.97). Which of the following is the frequency value of a tunnel diode oscillator? 100GHz 10GHz 1000GHz 100MHz HintMid value of frequency.98). Which of the following are the applications of tunnel diode oscillator? Relaxations Microwaves Amplifiers Both a and b Hint2 devices.99). The switching capacity of a tunnel diode is ____? High Low Zero Infinite HintMaximum value.100). Due to low current based property a tunnel diode is used as ___? FM receivers Oscillator circuits Amplifiers Both a and b Hint2 applications. Read more about FM.For More MCQsZener Diode Questions and AnswersSchottky Diode Questions and AnswersSemiconductor Diode Questions and Answers Time is Up! Time's up
