43 + Interview Questions in Diodes in Electronic Devices & Circuits Page 1 InterviewSolution

1.	For the circuit and the input signal shown which of the following is true for the output voltage?(a) The output waveform is a square wave with lowest peak clamped to 0V(b) The output wave is a square wave with lowest peak clamped to -6V(c) The output waveform is a square wave with highest peak clamped to 4V(d) The output waveform is a straight line with the value of output voltage equal to 10VThis question was addressed to me during an interview.The question is from Limiting and Clamping Circuits and Some Special Types of diodes in division Diodes of Electronic Devices & Circuits
Answer» The correct choice is (a) The OUTPUT waveform is a square WAVE with lowest PEAK clamped to 0V For EXPLANATION I would say: It is a clamped capacitor CIRCUIT.

Discussion

2.	In many applications, a conducting diode is modeled as having a constant voltage drop, usually approximately(a) 1 V(b) 0.1 V(c) 0.7 V(d) 7VI got this question in homework.This interesting question is from Modelling the Diode Forward Characteristics topic in section Diodes of Electronic Devices & Circuits
Answer» RIGHT ANSWER is (C) 0.7 V Explanation: NORMALLY a silicon diode has a voltage drop of 0.7V.

Discussion

3.	Which of the following is not true for a Schottky-Barrier Diode (SBD)?(a) It is formed by bringing metal into contact with a moderately doped n-type semiconductor material.(b) In the SBD, current is conducted by mainly by minority carriers.(c) The forward voltage drop of a conducting SBD is lower than that of a pn-junction diode.(d) SBD are used in the design of a special form of bipolar-transistor logic circuitsThe question was asked during an interview.My question is taken from Limiting and Clamping Circuits and Some Special Types of diodes in chapter Diodes of Electronic Devices & Circuits
Answer» Correct answer is (d) SBD are used in the design of a special form of bipolar-transistor LOGIC circuits The BEST I can explain: Current is conducted largely by electrons which are majority current CARRIERS.

Discussion

4.	The value of I and V for the circuit shown below are(a) 2A and 5V respectively(b) -2A and 5V respectively(c) -2A and -5V respectively(d) 2A and 0V respectivelyThe question was asked in an interview.This interesting question is from The Ideal Diode topic in chapter Diodes of Electronic Devices & Circuits
Answer» Correct option is (d) 2A and 0V respectively To explain: I = V/R or 5/2.5 or 2A For an ideal DIODE when it is conducting the POTENTIAL drop across its TERMINAL is zero.

Discussion

5.	Which of the following is true about the temperature coefficient or TC of the Zener diode?(a) For Zener voltage less than 5V, TCis negative(b) For Zener voltage around 5V, TC can be made zero(c) For higher values of Zener voltage, TC is positive(d) All of the mentionedThe question was asked during an interview.Enquiry is from Zener Diode topic in portion Diodes of Electronic Devices & Circuits
Answer» RIGHT ANSWER is (d) All of the mentioned To explain: All of the mentioned are TRUE for the TC of a ZENER diode.

Discussion

6.	The other name for bias point is(a) Quiescent point(b) Node point(c) Terminal point(d) Static pointI had been asked this question in an internship interview.The above asked question is from Modelling the Diode Forward Characteristics topic in chapter Diodes of Electronic Devices & Circuits
Answer»

Discussion

7.	The figure below shows a circuit for an AC voltmeter. It utilizes a moving-coil meter that gives a full-scale reading when the average current flowing through it is 1 mA. The moving-coil meter has a 50-Ω resistance. The value of R that results in the meter indicating a full-scale reading when the input sine-wave voltage VI is 20 V peak-to-peak is(a) 3.183 kΩ(b) 3.133 kΩ(c) 3.183 Ω(d) 56.183 ΩThe question was asked in an online interview.This key question is from The Ideal Diode in portion Diodes of Electronic Devices & Circuits
Answer» Right option is (b) 3.133 kΩ To explain I WOULD say: Average value of input VOLTAGE= 20/π or 6.366 V. Since there is diode half of the time there is no voltage across the voltmeter hence the average value of the input voltage is 10/π or 3.183V. The total resistance required to generate 1MA current is 3.183 kΩ out of which 50Ω is PROVIDED by the moving COIL. Therefore, a resistance of 3.133 kΩ is required.

Discussion

8.	Zener diodes can be effectively used in voltage regulator. However, they are these days being replaced by more efficient(a) Operational Amplifier(b) MOSFET(c) Integrated Circuits(d) None of the mentionedThis question was posed to me in final exam.I want to ask this question from Zener Diode topic in division Diodes of Electronic Devices & Circuits
Answer» The correct choice is (C) Integrated Circuits Best explanation: ICS have been widely adapted by the industries over conventional ZENER DIODES as their better replacements for a voltage regulators.

Discussion

9.	For a half-wave rectifier having diode voltage VD and supply input of VI, the diode conducts for π – 2Θ, where Θ is given by(a) tan^ -1 VD/VI(b) tan^-1VD/VI – VI(c) sin^-1VD/VI(d) sin^-1VD/VI – VIThe question was asked in a national level competition.My enquiry is from Rectifiers topic in section Diodes of Electronic Devices & Circuits
Answer» Right CHOICE is (c) sin^-1VD/VI For explanation I WOULD SAY: The diode doesn’t conducts when VD ≥VI . HENCE Θ = sin^-1(D/VI).

Discussion

10.	A designer requires a shunt regulator of approximately 20 V. Two kinds of Zener diodes are available: 6.8-V devices with rz of 10 Ω and 5.1-V devices with rz of 30 Ω. For the two major choices possible, find the load regulation. In this calculation neglect the effect of the regulator resistance R.(a) -30mV/mA and 120mV/mA respectively(b) 30mV/mA and 60mV/mA respectively(c) -60mV/mA and +60mV/mA respectively(d) -30mV/mA and -120mV/mA respectivelyThis question was posed to me in my homework.Origin of the question is Zener Diode in portion Diodes of Electronic Devices & Circuits
Answer» The correct OPTION is (d) -30mV/mA and -120mV/mA respectively To elaborate: Three 6.8v zeners provide 36.8 = 20.4v with 3 10 =30Ω Resistance, neglecting R, we have load REGULATION = -30mV/mA. For 5.1 Zeners we NEED 4 DIODES to provide 20.4v with 4 * 30 =120Ω Resistance. load Regulation = -120mV/mA .

Discussion

11.	For small-signal operation around the dc bias point, the diode is modeled by a resistance equal to the(a) Slope of the i-v characteristics of the diode at the bias point(b) Square root of the slope of the i-v characteristics of the diode at the bias point(c) Inverse of the slope of the i-v characteristics of the diode at the bias point(d) Square root of the inverse of the slope of the i-v characteristics of the diode at the bias pointI got this question in my homework.Asked question is from Modelling the Diode Forward Characteristics in chapter Diodes of Electronic Devices & Circuits
Answer» The CORRECT choice is (d) Square root of the inverse of the slope of the i-v characteristics of the DIODE at the bias point To elaborate: It is a required CHARACTERISTIC for small-ground OPERATIONS.

Discussion

12.	The diode rectifier works well enough if the supply voltage is much than greater than 0.7V. For smaller voltage (of few hundreds of millivolt) input which of the following can be used?(a) Superdiode(b) Peak rectifier(c) Precision rectifier(d) None of the mentionedI got this question in homework.The doubt is from Rectifiers in section Diodes of Electronic Devices & Circuits
Answer» Correct OPTION is (a) Superdiode To elaborate: For the supply voltages LESS than 0.7V super diodes are USED.

Discussion

13.	For the connections shown below, the equivalent logic gate is(a) OR gate(b) AND gate(c) XOR gate(d) NAND gateThe question was asked during a job interview.The origin of the question is The Ideal Diode topic in portion Diodes of Electronic Devices & Circuits
Answer» CORRECT answer is (a) OR gate To ELABORATE: The FOLLOWING circuit BEHAVES as a OR logic gate.

Discussion

14.	The figure below shows a circuit for charging a 12-V battery. If Vs is a sinusoid with 24-V peak amplitude, the fraction of each cycle during which the diode conducts is(a) One quarter of a cycle(b) One-third of a cycle(c) One half of the cycle(d) Three quarters of a cycleI had been asked this question by my college director while I was bunking the class.My question is taken from The Ideal Diode in chapter Diodes of Electronic Devices & Circuits
Answer» RIGHT OPTION is (b) One-third of a cycle For explanation I would SAY: For one half of the cycle the diode CONDUCTS when 24 COS(Θ) = 12 or Θ is 600. Hence for a complete cycle the diode does not conducts for 2Θ or 1200. Hence the diode does not conducts for a third of a cycle.

Discussion

15.	Which of the following is true for LEDs(a) The light emitted by a LED is inversely proportional to the current flowing through the diode(b) LED operate in a manner opposite to the working of the optoelectronics or photodiodes(c) LED cannot be used to generate coherent source of light(d) None of the mentionedI got this question during an online exam.My doubt stems from Limiting and Clamping Circuits and Some Special Types of diodes in portion Diodes of Electronic Devices & Circuits
Answer» Correct answer is (B) LED operate in a manner opposite to the working of the OPTOELECTRONICS or photodiodes The EXPLANATION is: The working of the optoelectronics is opposite to that of the LEDs.

Discussion

16.	Zener diodes are also known as(a) Voltage regulators(b) Forward bias diode(c) Breakdown diode(d) None of the mentionedThis question was posed to me during an online exam.I need to ask this question from Zener Diode topic in division Diodes of Electronic Devices & Circuits
Answer» Correct answer is (C) BREAKDOWN diode The explanation is: Zener DIODES are used as voltage regulators but they aren’t CALLED voltage regulators. They are called breakdown diodes since they operate in breakdown REGION.

Discussion

17.	The maximum and the minimum voltage across the diode D1 respectively is(a) 2Vp and 0V respectively(b) 0V and -2Vp respectively(c) Vp and -Vprespectively(d) 2Vp and Vp respectivelyI had been asked this question in semester exam.My question is from Limiting and Clamping Circuits and Some Special Types of diodes in division Diodes of Electronic Devices & Circuits
Answer» CORRECT CHOICE is (B) 0V and -2Vp respectively Explanation: It is a voltage DOUBLER circuit.

Discussion

18.	A 9.1-V zener diode exhibits its nominal voltage at a test current of 28 mA. At this current the incremental resistance is specified as 5 Ω. Find VZ0 of the Zener model.(a) 8.96V(b) 9.03V(c) 9.17V(d) 9.24VThis question was addressed to me in an online quiz.My question is from Zener Diode topic in chapter Diodes of Electronic Devices & Circuits
Answer» RIGHT ANSWER is (b) 9.03V Explanation: VZ = VZO + MZ IZT 9.1 = VZo + 5 * 28 * 10^-3 VZo = 8.96v VZ = VZo + 5IZ = 8.96 * 5IZ.

Discussion

19.	Find V0 when VI is 2V.(a) 0V(b) 0.7V(c) 1V(d) 1.7VI have been asked this question by my school principal while I was bunking the class.The origin of the question is Rectifiers topic in portion Diodes of Electronic Devices & Circuits
Answer» Correct answer is (a) 0V For EXPLANATION I would say: VI = 2v Vo = 0v VA = -0.7v V– = 0v Virtual gnd as negative feedback is CLOSED through R. VI > 0 D1 conducts D2 cutoff. VI < 0 D2 conducts D1 cutoff. ^V0 ⁄VI = -1.

Discussion

20.	Which of the following is method to model a diode’s forward characteristics?(a) Iteration method(b) Graphical method(c) Constant-voltage drop model(d) All of the mentionedI had been asked this question by my college professor while I was bunking the class.This intriguing question comes from Modelling the Diode Forward Characteristics topic in portion Diodes of Electronic Devices & Circuits
Answer» The correct answer is (d) All of the MENTIONED The explanation: All of the mentioned are DIFFERENT methods used to model a DIODE’s forward characteristics.

Discussion

21.	Optoisolator is(a) A combination of LED and varactor in the same package(b) A combination of a varactor and photodiode in the samepackage(c) A combination of LED and a photodiode in the same package(d) A combination of photodiode and Schottky-Barrier Diode in the same packageThe question was asked in an interview for internship.My question is taken from Limiting and Clamping Circuits and Some Special Types of diodes topic in section Diodes of Electronic Devices & Circuits
Answer» Correct option is (c) A COMBINATION of LED and a photodiode in the same PACKAGE To elaborate: By definition, an optoisolator is a package CONTAINING both LED as well as a photodiode.

Discussion

22.	Photodiodes are part of(a) Optoelectronics(b) High Intensity Discharge(c) Low pressure Discharge(d) None of the mentionedI have been asked this question in examination.This question is from Limiting and Clamping Circuits and Some Special Types of diodes topic in chapter Diodes of Electronic Devices & Circuits
Answer» CORRECT answer is (a) OPTOELECTRONICS For explanation: Optoelectronics are ALSO CALLED PHOTODIODES.

Discussion

23.	Bridge rectifier is an alternative for(a) Full wave rectifier(b) Peak rectifier(c) Half wave rectifier(d) None of the mentionedThis question was posed to me by my college professor while I was bunking the class.I would like to ask this question from Rectifiers topic in division Diodes of Electronic Devices & Circuits
Answer» CORRECT answer is (a) FULL WAVE RECTIFIER For explanation: Bridge rectifier is a better alternative for a full wave rectifier.

Discussion

24.	Which of the following can be used in series with a Zener diode so that combination has almost zero temperature coefficient?(a) Diode(b) Resistor(c) Transistor(d) MOSFETThe question was posed to me at a job interview.My question comes from Zener Diode topic in chapter Diodes of Electronic Devices & Circuits
Answer»

Discussion

25.	Which of the following is true about the resistance of a Zener diode?(a) It has an incremental resistance(b) It has dynamic resistance(c) The value of the resistance is the inverse of the slope of the i-v characteristics of the Zener diode(d) All of the mentionedThis question was addressed to me by my college director while I was bunking the class.Origin of the question is Zener Diode topic in portion Diodes of Electronic Devices & Circuits
Answer» The CORRECT CHOICE is (d) All of the mentioned To elaborate: All of the statements are true for the resistance of the ZENER DIODE.

Discussion

26.	For an ideal diode which of the following is true?(a) It allows the passage of current in the forward bias with zero potential drop across the diode(b) It does not allow the flow of current in reverse bias(c) All of the mentioned(d) None of the mentionedI had been asked this question by my college director while I was bunking the class.The question is from The Ideal Diode topic in chapter Diodes of Electronic Devices & Circuits
Answer» Correct choice is (C) All of the mentioned To explain: Both of the facts mentioned hold true for an ideal OPERATIONAL AMPLIFIER.

Discussion

27.	Consider a peak rectifier fed by a 60-Hz sinusoid having a peak value Vp = 100 V. Let the load resistance R = 10 kΩ. Calculate the fraction of the cycle during which the diode is conducting(a) 1.06 %(b) 2.12 %(c) 3.18%(d) 4.24%This question was addressed to me by my school principal while I was bunking the class.This intriguing question comes from Rectifiers topic in chapter Diodes of Electronic Devices & Circuits
Answer» The CORRECT option is (C) 3.18% The best I can explain: w Δt ~ √(2Vr/Vp) Θ = √(2 X 2/100) Θ = 0.2 RAD or 3.18% of the CYCLE

Discussion

28.	A voltage regulator needs to provide a constant voltage in spite of the fact that there may be(a) Change in the load current drawn from theterminals of the regulator(b) Change of the DC power supply that feeds the regulator circuit(c) None of the mentioned(d) All of the mentionedThis question was addressed to me during an internship interview.This intriguing question comes from Modelling the Diode Forward Characteristics in chapter Diodes of Electronic Devices & Circuits
Answer» RIGHT choice is (d) All of the MENTIONED Easy EXPLANATION: Voltage regulators are REQUIRED in both of the situations mentioned.

Discussion

29.	For a half wave or full wave rectifier the Peak Inverse Voltage of the rectifier is always(a) Greater than the input voltage(b) Smaller than the input voltage(c) Equal to the input voltage(d) Greater than the input voltage for full wave rectifier and smaller for the half wave rectifierThe question was asked in quiz.This intriguing question comes from Rectifiers topic in division Diodes of Electronic Devices & Circuits
Answer» Correct choice is (b) Smaller than the input VOLTAGE To elaborate: The peak input voltage is smaller than the input voltage due to the PRESENCE of diode(s). A single diode reduces the OUTPUT voltage by APPROXIMATELY 0.7V.

Discussion

30.	The units frequently used to measure the forward bias and reverse bias current of a diode are(a) µA and µA respectively(b) µA and mA respectively(c) mA and µA respectively(d) mA and mA respectivelyThe question was posed to me during an online exam.This intriguing question originated from The Ideal Diode in chapter Diodes of Electronic Devices & Circuits
Answer» Correct option is (c) mA and µA respectively Explanation: The CURRENTS in forward BIAS is generally in MA and in the reverse bias it is very SMALL and is generally MEASURED in µA.

Discussion

31.	In Zener diode, for currents greater than the knee current, the v-i curve is almost(a) Almost a straight line parallel to y-axis(b) Almost a straight line parallel to x-axis(c) Equally inclined to both the axes with a positive slope(d) Equally inclined to both the axes with a negative slopeI had been asked this question by my school teacher while I was bunking the class.My query is from Zener Diode topic in chapter Diodes of Electronic Devices & Circuits
Answer» CORRECT option is (B) Almost a STRAIGHT LINE parallel to x-axis To explain: Note that the curve is v-I curve and not an i-v curve.

Discussion

32.	The graphical method of modeling a diode characteristics is based on(a) Iteration method(b) Constant voltage drop method(c) Small signal approximation(d) Exponential methodI got this question during an interview.This interesting question is from Modelling the Diode Forward Characteristics in chapter Diodes of Electronic Devices & Circuits
Answer» Correct answer is (d) Exponential method For EXPLANATION: GRAPHICAL method uses EQUATIONS obtained in the exponential method and then the Answer of these equations is obtained by plotting them on a graph.

Discussion

33.	In iteration method for modelling a diode the answer obtained by each subsequent iteration is(a) Is close to the true value(b) Is close to the value obtained by exponential method(c) All of the mentioned(d) None of the mentionedThe question was posed to me during an internship interview.This intriguing question originated from Modelling the Diode Forward Characteristics topic in chapter Diodes of Electronic Devices & Circuits
Answer» The correct option is (c) All of the mentioned Easy explanation: TRUE VALUE is OBTAINED by the EXPONENTIAL method and therefore both of the statements are true.

Discussion

34.	The maximum load current that can be drawn is(a) 1.4 mA(b) 2.3 mA(c) 1.8 mA(d) 2.5 mAI have been asked this question in an online quiz.My query is from Diode Circuits in section Diodes of Electronic Devices & Circuits
Answer» CORRECT choice is (a) 1.4 mA Easiest explanation: At REGULATED poer SUPPLY, Is = 30-9/15k or 1.4 mA. The load CURRENT will remain LESS than this current.

Discussion

35.	Limiting and clamping circuits are employed in(a) FM transmitters(b) Television receivers and transmitter(c) Production of various signal waveforms such as trapezoidal, square or rectangular waves(d) All of the mentionedThe question was asked in my homework.My query is from Limiting and Clamping Circuits and Some Special Types of diodes topic in portion Diodes of Electronic Devices & Circuits
Answer» RIGHT choice is (d) All of the mentioned To EXPLAIN I would say: All of the given are uses of LIMITING and CLAMPING circuits.

Discussion

36.	A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as a DC source. To overcome this one can use(a) A capacitor in series with a the load resistance(b) A capacitor in parallel to the load resistance(c) Both of the mentioned situations will work(d) None of the mentioned situations will workThe question was asked in unit test.This intriguing question comes from Rectifiers topic in section Diodes of Electronic Devices & Circuits
Answer» The CORRECT choice is (b) A capacitor in PARALLEL to the load resistance Easiest explanation: A capacitor is parallel with a resistor can only makes ripples go away. Series connection will become EQUAL to an open circuit once the capacitor is fully CHARGED.

Discussion

37.	Which of the following is true for a bridge rectifier?(a) The peak inverse voltage or PIV for the bridge rectifier is lower when compared to an identical center tapped rectifier(b) The output voltage for the center tapped rectifier is lower than the identical bridge rectifier(c) A transistor of higher number of coil is required for center tapped rectifier than the identical bridge rectifier(d) All of the mentionedI got this question in a job interview.This question is from Rectifiers topic in section Diodes of Electronic Devices & Circuits
Answer» The correct answer is (d) All of the mentioned To EXPLAIN: All of the GIVEN STATEMENTS are TRUE for a bridge RECTIFIER.

Discussion

38.	Which of the following isn’t a type of rectifier?(a) Precision Half-wave Rectifier(b) Bridge Rectifier(c) Peak Rectifier(d) None of the mentionedI got this question by my school principal while I was bunking the class.My enquiry is from Rectifiers topic in chapter Diodes of Electronic Devices & Circuits
Answer» The CORRECT CHOICE is (d) NONE of the mentioned For EXPLANATION: All of the mentioned are different types of a rectifier.

Discussion

39.	Calculate the change in the voltage when RL is connected as shown(a) -10 mA(b) -15 mA(c) -20 mA(d) -25 mAThis question was posed to me in an interview for internship.Query is from Modelling the Diode Forward Characteristics topic in section Diodes of Electronic Devices & Circuits
Answer» Right option is (c) -20 mA To explain: When RL is CONNECTED it draws approx. 2.1v/1000 A CURRENT or 2.1 mA. Hence the current in the diode decreases by approximately 2.1 mA. The voltage change across the diode is THUS -2.1mA * 9.6 Ω or -20mA.

Discussion

40.	Diodes can be used in the making of(a) Rectifiers(b) LED lamps(c) Logic gates(d) All of the mentionedThe question was posed to me in homework.Origin of the question is The Ideal Diode in portion Diodes of Electronic Devices & Circuits
Answer» Correct choice is (d) All of the mentioned The explanation is: Diodes are used to make rectifiers (full wave or half wave rectifiers are the most common EXAMPLES), LED LAMPS uses diodes (diodes are generally doped for their use in this purpose) and LOGIC gates can also be made using diodes using the fact that diodes are conducting only in the forward biased configuration.

Discussion

41.	Which of the following is not true for the duty cycle of a waveform?(a) Duty cycles can be used to describe the percent time of an active signal in an electrical device(b) Duty cycle can be used to determine the percentage of the time a signal is active(c) 60% duty cycle means that the waveform is active for 40% of the total time(d) 50% duty cycle means that the waveform is non-active for 50% of the total timeThis question was posed to me in homework.The origin of the question is Limiting and Clamping Circuits and Some Special Types of diodes topic in chapter Diodes of Electronic Devices & Circuits
Answer» RIGHT answer is (c) 60% DUTY CYCLE means that the WAVEFORM is active for 40% of the TOTAL time The explanation is: 60% duty time means that a signal is active for 60% of the total time.

Discussion

42.	The value of the diode small-signal resistance rd at bias currents of 0.1 mA is(a) 250 Ω(b) 25 Ω(c) 2.5 Ω(d) 0.25 ΩI have been asked this question during an internship interview.The origin of the question is Modelling the Diode Forward Characteristics in chapter Diodes of Electronic Devices & Circuits
Answer» The correct OPTION is (a) 250 Ω The explanation is: THERMAL voltage at room temperature is 25mV and the current is 0.1mA. RD = 25mV/0.1mA or 250 Ω.

Discussion

43.	A diode(a) Is the simplest of the semiconductor devices(b) Has a characteristic that closely follows that of a switch(c) Is two terminal device(d) All of the mentionedI have been asked this question by my school principal while I was bunking the class.My query is from The Ideal Diode in section Diodes of Electronic Devices & Circuits
Answer»

Discussion

Explore topic-wise InterviewSolutions in .

The other name for bias point is(a) Quiescent point(b) Node point(c) Terminal point(d) Static pointI had been asked this question in an internship interview.The above asked question is from Modelling the Diode Forward Characteristics topic in chapter Diodes of Electronic Devices & Circuits

For the connections shown below, the equivalent logic gate is(a) OR gate(b) AND gate(c) XOR gate(d) NAND gateThe question was asked during a job interview.The origin of the question is The Ideal Diode topic in portion Diodes of Electronic Devices & Circuits

Zener diodes are also known as(a) Voltage regulators(b) Forward bias diode(c) Breakdown diode(d) None of the mentionedThis question was posed to me during an online exam.I need to ask this question from Zener Diode topic in division Diodes of Electronic Devices & Circuits

Find V0 when VI is 2V.(a) 0V(b) 0.7V(c) 1V(d) 1.7VI have been asked this question by my school principal while I was bunking the class.The origin of the question is Rectifiers topic in portion Diodes of Electronic Devices & Circuits

The maximum load current that can be drawn is(a) 1.4 mA(b) 2.3 mA(c) 1.8 mA(d) 2.5 mAI have been asked this question in an online quiz.My query is from Diode Circuits in section Diodes of Electronic Devices & Circuits

Calculate the change in the voltage when RL is connected as shown(a) -10 mA(b) -15 mA(c) -20 mA(d) -25 mAThis question was posed to me in an interview for internship.Query is from Modelling the Diode Forward Characteristics topic in section Diodes of Electronic Devices & Circuits

Diodes can be used in the making of(a) Rectifiers(b) LED lamps(c) Logic gates(d) All of the mentionedThe question was posed to me in homework.Origin of the question is The Ideal Diode in portion Diodes of Electronic Devices & Circuits