Photodiode is limited to the reverse-bias region in its region of operation.
Description : In which region is the operating point stable in tunnel diodes? (1) Negative-resistance (2) Positive-resistance (3) Both negative- and positive-resistance (4) Neither negative- nor positive-resistance
Last Answer : In Negative-resistance region is the operating point stable in tunnel diodes.
Description : Depletion region of a junction is formed _________ (a) during the manufacturing process (b) under forward bias (c) under reverse bias (d) when temperature varies
Last Answer : (a) during the manufacturing process
Description : Silicon diodes designed for a specific reverse breakdown voltage, become useful as an electronic power supply voltage regulator, called _____________. A. tunnel diodes B. hot-carrier diodes C. compensating diodes D. Zener diodes
Last Answer : Answer: D
Description : Current limited power supplies can prevent damage to A) Rectifier diodes and power transformers. B) Pass transistors C) Other circuits in the system D) All of the above.
Last Answer : D) All of the above.
Last Answer : In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.
Description : What causes diodes to fail in alternator?
Last Answer : alternator
Description : While troubleshooting a circuit in an engine room central control console, a resistor is suspected of being faulty. Which of the following precautions must be observed if an ohmmeter is to be used to ... of the component isolated. D. The meter case must be grounded prior to attaching the leads.
Last Answer : Answer: C
Description : Explain with neat sketch construction of PIN Diode. Draw its characteristics in reverse bias mode.
Last Answer : Construction A PIN diode is made up of three semiconductor materials; two heavily doped P- and N- type material separated by an intrinsic (undoped) semiconductor (I) as shown in above figure ... . This advantage allows the PIN diode to process even weak signals. Characteristics
Description : Junction breakdown occurs: a) With forward bias b) With reverse bias c) Under high temperature condition d) Because of excess heating of the diode
Last Answer : Ans: B
Description : The width of depletion layer of a P-N junction – (1) decreases with light doping (2) increases with heavy doping (3) is independent of applied voltage (4) is increased under reverse bias
Last Answer : (4) is increased under reverse bias Explanation: The total width of the depletion region is a function of applied reverse-bias and impurity concentration. Forward bias decreases the depletion region width whilst reverse bias increases it.
Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector
Description : In the illustration, the small battery and Rb are in the circuit to apply ________. EL-0022 A. forward bias to the emitter-base B. reverse bias to the emitter-base C. a 'reference charge' on the input capacitor D. a buffer between the input ground and the emitter ground
Last Answer : Answer: A
Description : In the illustration, the large battery and R(L) are in the circuit to ________. EL-0022 A. forward bias the emitter-base B. reverse bias the emitter-base C. forward bias the emitter/collector D. reverse bias the emitter/collector
Description : When using an ohmmeter to test a semiconductor diode, you find a low resistance in both the forward and reverse bias directions. This indicates that the diode has a/an ____________. A. open B. short C. good resistive quality D. good capacitive quality
Last Answer : Answer: B
Description : Why is there a small flow current during reverse bias?
Last Answer : In reverse bias there is a small flow of current due to minority charge carries electrons in p region and holes in n region.
Description : A device used to avoid the relay destroying the op-amp is A. diode B. LED C. reverse bias diode D. forward biased diode
Last Answer : reverse bias diode
Description : Applying a reverse bias to the gate of an FET has what effect?
Last Answer : Source-to-drain resistance increases.
Description : When the reverse bias on a varactor is increased, what happens to the effective capacitance?
Last Answer : Capacitance decreases.
Description : Which breakdown theory explains the action that takes place in a heavily doped PN-junction with a reverse bias of less than 5 volts?
Last Answer : Zener effect.
Description : In order to reverse bias in a PN junction, what terminal of a battery is connected to the P material?
Last Answer : Negative.
Description : Both LEDs and ILDs operate correctly with ∙ A. forward bias ∙ B. reverse bias ∙ C. neither forward nor reverse bias ∙ D. either forward or reverse bias
Last Answer : A. forward bias
Description : Photodiodes operate properly with ∙ A. forward bias ∙ B. reverse bias ∙ C. neither forward nor reverse bias ∙ D. either forward or reverse bias
Last Answer : ∙ B. reverse bias
Description : Photodiodes operate property with ∙ a. Forward bias ∙ b. Reverse bias ∙ c. Neither A or B ∙ d. Either A or B
Last Answer : ∙ b. Reverse bias
Description : Both LEDs and ILDs operate correctly with ∙ a. Forward bias ∙ b. Reverse bias ∙ c. Neither A or B ∙ d. Either A or B
Last Answer : a. Forward bias
Description : On increasing the reverse bias to a large value in a p-n junction diode current (a) Increases slowly (b) Remains fixed (c) Suddenly increases (d) Decreases slowly
Last Answer : (c) Suddenly increases
Description : Process of conversion low voltage to high voltage is called _______ (a) Rectification (b)forward bias (c) reverse bias (d) amplification
Last Answer : (d) amplification
Description : Photo diode operates in the _______ condition (a) Forward bias (b) null (c) both a & d (d) reverse bias
Last Answer : (d) reverse bias
Description : When a reverse bias is applied to a diode, it will a. Raise the potential barrier b. Lower the potential barrier c. Increases the majority-carrier a current greatly d. None of these
Last Answer : a. Raise the potential barrier
Description : Avalanche breakdown in a diode occurs when a. Potential barrier is reduced to zero. b. Forward current exceeds certain value. c. Reverse bias exceeds a certain value. d. None of these
Last Answer : c. Reverse bias exceeds a certain value.
Description : The width of depletion layer of a P-N junction (1) decreases with light doping (2) increases with heavy doping (3) is independent of applied voltage (4) is increased under reverse bias
Last Answer : is increased under reverse bias
Description : Define i)P-N junction diode ii) Depletion layer iii)Forward bias iv)Reverse bias of P-N junction diode
Last Answer : i)P-N junction diode: It is a semiconductor device in which half of its region is P-type and other half is N-type. ii) Depletion layer: The region where free electrons and free holes are absent ... and negative terminal is connected to p-side of p-n junction diode, it is said to be reverse bias.
Description : A diode in which the change in reverse bias voltage varies the capacitance is called as A) Varactor diode B) Switching diode C) Tunnel diode D) Zener-diode
Last Answer : A diode in which the change in reverse bias voltage varies the capacitance is called as Varactor diode
Description : When reverse bias is applied to a junction diode, it 1.increases the potential barrier 2.decreases the potential barrier 3.greatly increases the minority carrier current 4.greatly increases the majority carrier current
Last Answer : When reverse bias is applied to a junction diode, it increases the potential barrier
Last Answer : A reverse bias pn junction has Almost no current.
Description : What is the difference between forward and reverse bias?
Last Answer : Forward bias is a PN junction bias which allows current to flow through the junction. Forward bias decreases the resistance of the depletion layer. Reverse bias is a PN junction bias that allows only ... Positive polarity on the n-type material and negative polarity to the p-type material.
Description : Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage
Last Answer : Definition of parameters of OPAMP is follows: i) Input Offset Voltage: Input offset voltage is defined as the voltage that must be applied between the two input terminals of an OPAMP to null or ... to ground) and output voltage is obtained non zero such voltage is output offset voltage of opamp.
Description : The primary function of the bias circuit is to: (1) Hold the circuit stable at VCC (2) Hold the circuit stable at vin (3) Ensure proper gain is achieved (4) Hold the circuit stable at the designed Q-point
Last Answer : The primary function of the bias circuit is to: Hold the circuit stable at the designed Q-point
Description : How much time a diode takes to switch ON in forward bias condition.
Last Answer : t=0 sec.
Description : An FET has a gate source bias of 2 V. The ac input signal is ± 1.2 V. The class of operation is A) A B) B C) C D) AB
Last Answer : D) AB
Description : What type of bias is required for proper operation of a photodiode?
Last Answer : Reverse bias.
Description : The large signal bandwidth of an opamp is limited by its: (1) Loop gain (2) Slew rate (3) Output impedance (4) Input frequency
Last Answer : The large signal bandwidth of an opamp is limited by its: Slew rate.
Last Answer : 10 ohm
Description : How can we protect circuit from reverse voltage polarity?
Last Answer : We can protect circuit from reverse voltage by connecting diode in series but connecting diode in series is less efficient. So we can also protect circuit from reverse voltages by connecting p channel ... gate and source of mosfet and input voltage is applied between drain and Gate of mosfet.
Description : If a signal band limited to fm is sampled at a rate less than 2fm, then the constructed signal will be A) Large in amplitude B) Small in amplitude C) Distorted D) Distortion less
Last Answer : If a signal band limited to fm is sampled at a rate less than 2fm, then the constructed signal will be Distorted
Description : Did you ever realize that long division is the reverse operation of multiplication?
Last Answer : Kinda always known this. However, by all means teach this. I took a grotesque amount of math in High School and College and I have tutored all three of my sisters kids in math for the last decade. In high ... taught how.. In college I learned the why . The latter is a hell of a lot more valuable.
Description : Coast Guard Regulations (46 CFR) require that each alternating current generator arranged for parallel operation shall be provided with _____________. A. more than one means of excitation B. individual circuit fuses C. a high back-pressure trip D. a reverse-power trip
Description : If coils 'R1-R2-R3' at the receiver of figure 'B' shown in the illustration were in 180 degree error with those of the transmitter, what corrective action should be taken? EL-0092 A. Reverse the 60 Hz ... is proper operation. C. Interchange leads 'R1' and 'R3'. D. Interchange leads 'R2' and 'R3'.
Description : If coil 'R1-R2' at the receiver of figure 'A' shown in the illustration were in 180 degree error with respect to that of the transmitter, what corrective action should be taken? EL-0092 A. No action is ... and 'R2'. C. Interchange connections 'S1' and 'S2'. D. Interchange connections 'S1' and 'S3'.
Description : If coil 'R1-R2' at the receiver of figure 'A' shown in the illustration turned opposite of that in the transmitter, what corrective action should be taken? EL-0092 A. No action is necessary as this is ... . C. Interchange connections to 'S1' and 'S2'. D. Interchange connections to 'S1' and 'S3'.
Description : Separation of fresh water from sea water can be done by the __________ operation. (A) Osmosis (B) Reverse osmosis (C) Absorption (D) Adsorption
Last Answer : (B) Reverse osmosis