What is the typical back-to-forward resistance ratio of a  good-quality diode?

1 Answer

Answer :

10-to-1 ratio.

Related questions

Description : As a rule of thumb, what is an acceptable ratio of back-to forward resistance for a diode?

Last Answer : Greater than 10 to 1

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 : What is a typical light-to-dark resistance ratio for a photocell?

Last Answer : 1:1000.

Description : Why does a forward biased diode offer low resistance?

Last Answer : The external voltage over comes the junction potential and provides an easy path for the flow of charges across the junction. Hence it offers low resistance.

Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is also in series with the diode. The current is a. 10 mA b. 9.3 mA c. 0.7 mA d. 0

Last Answer : b. 9.3 mA

Description : When the diode is forward biased, it is equivalent to a. An off switch b. An On switch c. A high resistance d. None of the above

Last Answer : b. An On switch

Description : Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.

Last Answer : Definition: The resistance offered by the diode to the AC operating conditions is known as the Dynamic resistance' or Incremental resistance' or AC resistance' of a diode. It is ... Dynamic resistance is actually the reciprocal of the slope of the forward characteristics.

Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is

Last Answer : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is 9.3 mA

Description : An ohmmeter used to test for front-to-back resistance of a PN junction diode should produce roughly what ratio? A. 100:01:00 B. 500:01:00 C. 1000:01:00 D. 5000:01:00

Last Answer : Answer: A

Description : When checking a diode with an ohmmeter, what is indicated by two high resistance measurements?

Last Answer : The diode is open or has a high-forward resistance.

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 : While testing a semi-conductor diode with an ohmmeter, both the forward and reverse readings are almost in the infinity range. This would indicate that the unit is _____________. A. good B. open C. grounded D. shorted

Last Answer : Answer: B

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 : A light emitting diode emits light only when (a) Reversed biased (b) forward biased (c) unbiased (d) none

Last Answer : (b) forward biased

Description : Forward current through a semi-conductor diode circuit is due to ________ (a) Minority carriers (b) majority carriers (c) holes (d) electrons

Last Answer : (b) majority carriers

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 : 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 : Describe the working of PN junction diode with neat sketch under forward biased condition.

Last Answer : If the p-region (anode) is connected to the positive terminal of the external DC source and nside (cathode) is connected to the negative terminal of the DC source then the biasing ... The large number of majority carriers crossing the junction constitutes a current called as the forward current.

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 : Explain the forward bias characteristics of a P-N Junction diode. 

Last Answer : forward and reverse characteristics of P-N junction diode.

Description : When the diode is forward biased, it is equivalent to

Last Answer : When the diode is forward biased, it is equivalent to An On switch

Description : To turn a UJT ON, the forward bias on emitter diode should be:  1. more than the peak point voltage 2. less than the peak point voltage 3. Equal to the peak point voltage 4. Equal to the stand - off voltage  

Last Answer : To turn a UJT ON, the forward bias on emitter diode should be: more than the peak point voltage 

Description : How much time a diode takes to switch ON in forward bias condition.

Last Answer : t=0 sec.

Last Answer : Yes it can be, and it will act like a normal PN junction diode. The characteristic of ZENER diode is exactly same as PN junction diode in forward Bias.

Description : What is the relative length of the time constant for the diode capacitor combination in a damper (long or short)?

Last Answer : Short time constant.

Description : What is the condition of the diode in a series limiter when an output is developed? In a parallel limiter?

Last Answer : Conducting, cutoff.

Description : In the tunnel diode, the tunneling current is at what level when the forbidden gap of the N-type material is at the same energy level as the empty states of the P-type material?

Last Answer : Minimum.

Description : Why is electron flow with the arrow in the symbol of a Zener diode instead of against the arrow as it is in a normal diode?

Last Answer : Because Zener diodes are operated in the reverse bias mode.

Description : During avalanche effect breakdown, what limits current flow through the diode?

Last Answer : an external current-limiting resistor

Description : What is the doping level of an avalanche effect diode when compared to the doping level of a Zener-effect diode?

Last Answer : The doping level of an avalanche effect diode is lower.

Description : What is the name of the simplest type of rectifier which uses one diode?

Last Answer : The half-wave rectifier.

Description : What is the greatest threat to a diode?

Last Answer : Heat.

Description : What type of diode has orange, blue, and gray bands?

Last Answer : 1N368.

Description : What is meant by diode ratings?

Last Answer : They are the limiting values of operating conditions outside which operations could cause diode damage.

Description : What is used to show how diode parameters vary over a full operating range?

Last Answer : A characteristic curve.

Description : What type of bias makes a diode act as a closed switch?

Last Answer : Forward bias.

Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?

Last Answer : Point-contact.

Description : In reference to the schematic symbol for a diode, do electrons flow toward or away from the arrow?

Last Answer : Toward the arrow.

Description : What is the purpose of a PN junction diode?

Last Answer : To convert alternating current into direct current

Description : For a diode to act as a rectifier, should it be connected in series or parallel with the load?

Last Answer : Series.

Description : What term is used to describe the period when the diode is not conducting?

Last Answer : Cutoff.

Description : Describe the output of a laser diode.

Last Answer : The LD's output has a narrow spectral width and small output beam angle.

Description : Why would a laser diode be used in a low-data-rate digital application?

Last Answer : When extremely high transmitter output powers are required.

Description : Is the drive circuitry generally more complex for an LED or a laser diode? Why?

Last Answer : For a laser diode. The laser diode transmitter generally contains output power control circuitry and may contain a TE cooler and some circuitry associated with the TE cooler.

Description : At frequencies above 100 megahertz, the intrinsic (i) region causes a pin diode to act as what?

Last Answer : Variable resistance.

Description : What are the most important advantages of the Schottky barrier diode?

Last Answer : Lower forward resistance and low noise.

Description : What is the capacitive reactance across a point-contact diode as compared to a normal junction diode?

Last Answer : Lower.

Description : During the manufacture of a point-contact diode, what is the purpose of passing a relatively large current from the catwhisker to the silicon crystal?

Last Answer : . To form a small region of p-type material

Description : What causes dc bias energy to be absorbed by avalanche electrons and given up to the microwave field applied to an avalanche transit-time diode?

Last Answer : The negative-resistance property.