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any diode if connected to where the anode is tie to a negative potential will block that voltage. Up to the limit of the breakdown potential of the diode whereby avalanche current will destroy the diode unless current limited
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoA blocking diode is not a special type of diode, it is simply a diode that is used to block current from moving in one direction. This could for example be to prevent the user from damaging an electronic device from reversing the polarity of the power supply.
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What is the difference between 1n4004 diode and 1n4007 diode?
The main difference between a 1n4004 and a 1n4007 are in the maximum RMS voltage, the maximum DC blocking voltage and the maximum repetitive peak reverse voltage. These are 280 and 700, 400 and 1000, and 400 and 1000 volts respectively.
How much voltage appears across a zener diode when it is forward-biased?
That depends on the zener voltage rating:"low voltage" zeners are just a simple single diode, the zener diode"high voltage" zeners contain 2 back to back diodes in one package, the zener diode and an ordinary diode that is reverse biased when the zener diode is forward biased to block forward conduction of the zener and protect it from overcurrent damage if installed backwards by mistakeThus in "low voltage" zeners when forward biased they will have a normal diode drop (e.g. 0.7V), but "high voltage" zeners when "forward biased" they will act open due to the reverse biased blocking/protection diode in series with the zener.
How is zener diode different from a conventional diode or ideal diode?
zener diode :zener diode operates under reverse bias voltageideal diode :ideal diode operates under forward bias voltage
Can a diode be used as rectifier diode?
yes, diode can be used as rectifier diode to convert ac to dc
What is Zener resistance of the Zener diode?
zener resistance of a zener diode is the resistance of the zener diode but which is the resistance of a diode
What is the purpose is of a diode?
The purpose of a diode is to allow electric current to pass in one direction while blocking electric current in the opposite direction. It is for this reason that diode is usually referred as the check valve.
Why the negative half cycle cannot pass through the diode?
When the diode is reverse biased a depletion zone is formed at the junction between the cathode and anode, that lacks current carriers (it has neither electrons or holes). Without current carriers, the diode acts as an open circuit, blocking current flow.
Why use blocking diode across the relay coil?
Coils have the strange property that when electricity is released from them, they reverse polarity and spike the remaining current back towards the source. The diode is there to "block" this from hitting the power supply and potentially causing damage.
If a diode is connected to a battery and a lamp what happens when the diode direction is reversed?
I diode allows current to flow in only one direction. Therefore, if a lamp is "on" in a DC circuit, and the diode in series with the lamp is reversed, the light will be turnned off due to the diode blocking current flow (unless the voltage is above the breakdown voltage of the diode - if this is the case, the diode will fail). If this is an AC circuit, every half cycle the diode will turn on, then the next half cycle it will turn off. To your eye, the bulb will most likely appear slightly dim due to this on then off cycling. If the diode is reversed, there will be no apparent change. The difference is the half cycle the diode would have been off before reversing, it will now be on, etc.
What is the difference between 1n4004 diode and 1n4007 diode?
The main difference between a 1n4004 and a 1n4007 are in the maximum RMS voltage, the maximum DC blocking voltage and the maximum repetitive peak reverse voltage. These are 280 and 700, 400 and 1000, and 400 and 1000 volts respectively.
How much voltage appears across a zener diode when it is forward-biased?
That depends on the zener voltage rating:"low voltage" zeners are just a simple single diode, the zener diode"high voltage" zeners contain 2 back to back diodes in one package, the zener diode and an ordinary diode that is reverse biased when the zener diode is forward biased to block forward conduction of the zener and protect it from overcurrent damage if installed backwards by mistakeThus in "low voltage" zeners when forward biased they will have a normal diode drop (e.g. 0.7V), but "high voltage" zeners when "forward biased" they will act open due to the reverse biased blocking/protection diode in series with the zener.
How is zener diode different from a conventional diode or ideal diode?
zener diode :zener diode operates under reverse bias voltageideal diode :ideal diode operates under forward bias voltage
What is the impotrance of diode in electronics?
the importance of a diode in electronics is based on the fact that it can work as a semiconductor and it is used to allow power either way, forward or reverse. To major more on its forward factor; we take Zenar diode as an example. it allows volts to pass through it blocking it from flowing on reverse. This is the kind of principle used to make the solar panels, where the already saved voltage are not allowed to fall back, though in Zenar diode there is a slight fall back of up to 0.7volts, that is, if you have a voltage of 40.7 volts and it loses 0.7 volts, you will then be left with 40 volts. (40.7 - 0.7). That is the sense behind the diode, where we have several different once including the LED (Light Emittimg Diode).
How does a diode change from AC to DC?
it clips all the bottom voltage off the sine wave,to get steady dc voltage you will need to clean up the ripple to get good voltage regulation <><><> A diode does not change AC to DC, but it does allow alternating current to flow in only one direction. A diode (or often 2 or 4 diodes) with a filter can be used to rectify AC into DC.
Can a diode be used as rectifier diode?
yes, diode can be used as rectifier diode to convert ac to dc
What does the silver band on a car electrical diode mean?
The silver band shows which end is the negative (Cathode) end. If you are using it as a blocking diode, the other end (+ve Anode) should be connected to the +ve supply. Power will pass through and be available at the end with the stripe. If you put it the other way around, it will block the current.
How do you prevent battery power discharge from solar panel charger?
You need to use a blocking diode wired in series to prevent battery discharge via the solar panel at times of no sunlight, eg nighttime.
