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Diodes allow current to flow in only one direction, and if the diode is put a certain way around in the circuit such that it DOES allow current to flow, then it is forward biassed. If the diode is put in the circuit so that it doesn't allow the current to flow, then it is reverse biassed.
It is just a term used to describe the orientation of the diode relative to the (conventional) flow of current through the circuit.
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Describe forward-biased diode?
A specific amount of current is allowed to flow through a diode. If the current passing through the diode exceeds this specific value, the diode gets heated and is likely to be damaged. Therefore, in the biasing circuit of a resistance which limits the current passing through the diode within its specific value is called Forward biased diode. ANSWER: A forward bias diode is just a diode that it is conducting in the forward direction. Positive to anode and negative to cathode
When a voltage is applied across a diode and current flows we say the diode is what?
One description would be forward biased.
Is it can say as a 4.9v zener diode If you connect seven 0.7v silicon diodes in forward bias in series?
When the design says 4.9v zener diode that is all I would put. The more complicated an alternative you try the more things that can go wrong. A silicon diode is not the same as a zener diode, and cannot be used to replace a zener, with reasonable expectation that the circuit will continue to operate as designed.
Explain the output wave form a circuit which has a zener diode in reverse biased?
A zener diode has a relatively constant reverse voltage, at the designated zener voltage. If you had a circuit, say, with an AC source, a resistor, and a zener, the waveform across the zener would be the AC source, clipped at the reverse bias zener voltage, and clipped again at the forward bias voltage, typically about 0.7 V.
Is DC biased is forward biased?
Forward bias implies that your device is sensitive to bias direction and you have selected one of them. There is also an implication that it is probably a steady bias. So forward bias generally implies a dc bias in a selected direction called forward bias in the device you are looking at. Now the question is actually put the other way round. DC bias means a steady state bias. Whether or not it is forward or reverse bias depends on whether or not the device is sensitive to the direction of bias. If it is not sensitive to that, it isn't forward bias (or reverse bias either). If it is sensitive to bias direction, then it would be in a state of either forward bias or reverse bias, and you would need more information in order to say which one. So, finally, the phrase "dc biased" is NOT the same thing as "forward biased".
What does it means when we say-diode is specially designed to operate under reverse bias in breakdown region?
You are talking about a special type of diode called a zener diode which is designed, using special junction doping, to allow controllable reverse bias operation at a reduced breakdown voltage with a much sharper knee point curve than its normal forward breakdown curve. This allows the diode to be used as a voltage regulator. Normally, a diode's reverse breakdown curve is such that, at reverse breakdown, it avalanches and, without current limits in place, will self destruct. The zener diode, on the other hand, will operate in reverse much the same as it does in forward, just at a different voltage, and with a much sharper current to voltage curve, making it highly suitable as a voltage regulator.
How do you check a diode?
the diode will have two polarities anode and cathode .take multimeter and set it in buzer mode or resistance mode and connect the positive terminal of multimeter to anode of diode and negative to the cathode the multimeter shows the resistance say 500-700ohms if it working and doesn't show any impedance i.e, very high impedance in reverse bias i.e, by connecting the positive terminal of multimeter to cathode of diode and negative terminal to anode,and in no working condition it shows same characteristics as in reverse bias connected. the simple way of checking diode is connect the 2v led in series with the diode to the battery of 3v the led will glow if the diode is connected in forward bias in circuit and it doesn't glow if the diode is connected in reverse bias in circuit /diode is damaged . A: a diode will conduct from cathode [negative ] to anode [positive] A stripe at one end is the cathode or a stripe on the arrow is the cathode. By applying the proper voltage it will conduct and show low resistance and a voltage from .6v to .7v. Reversing the lead it will show relatively hi resistance.
What is mean by limitter diode?
Diodes theoretically conduct in one direction but not the other. In practice, diodes require a certain amount of voltage too make them conduct. We call this "forward bias". For silicon, it's 0.6 volts. If we connect two silicon diodes in parallel, one in each direction, across a 2 wire port (let's say it's carrying an audio signal), as long as the signal says below the forward bias voltage, nothing happens. When the signal exceeds 0.6 volts (positive and/or negative), the diode conducts, and the portion of the signal exceeding 0.6 volts is shunted, which limits the signal to 0.6 volts. For other voltages, we can use Germanium (0.2 volts), zener diodes, and such.
Why is a diode called unidirectional?
A diode is unidirectional because of the diode only conduct in forwardbias .As you know the diode have two terminal cathode and anode . and when the positive terminal of battery connected to the p-side and other terminal connected to the other terminal of diode then diode is called forward biased . and when it connection is just opposite then it become in reverse biased . so we can finally say that the diode is unidirectional
Are diodes polarised?
Yes, diodes are very polarity sensitive. They conduct in one direction, the forward bias state, where the anode is more positive than the cathode, and they do not conduct in the other direction, the reverse bias state, where the cathode is more positive than the anode. (Assuming you do not exceed forward current or reverse voltage limits.) This is how diodes "rectify", i.e. convert from AC to DC.This is for normal diodes. Zener diodes are different. They conduct in both directions, but at different voltages. The forward voltage is similar to a normal diode, typically around 0.6V to 1.4V, while the reverse voltage is higher, such as 5.6V, which is how a zener diode can be used in a voltage regulator circuit.If, however, when you say "polarised", you mean the action of "polarising" an automobile's electrical system, do not even think about it. That technique is no longer necessary since the advent of the alternator. Besides, that technique involves shorting out the battery, which has always been a highly dangerous operation.
What does bias mean in ict?
It is a one sided opinion for example if you are from Liverpool your most likely to support Liverpool and say" Liverpool is better than man u" so its a bias opinion
What is the difference between diode and resistors?
the resistance of a diode is .4 ohms is made of tantalum or .7 ohms if made of silicon. ANSWER: THE RESISTANCE OF A DIODE IS SIMPLY V/I the impedance however is defines by Boltzmann constant
