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A diode is made up of a P-Type and an N-Type semiconductor. P-Type has "missing" electrons (in a sense); N-Type has extra electrons (in a sense). This means that if you have current going through the two semiconductors from N-type into P-type, it should be easier than normal to apply the current because there is a potential difference between the N-type and P-type because of their relative "positivity" and "negativity". ...but if you reverse the voltage, then you are going against this potential difference and hence the voltage is impeded, resulting in a 0 current (in theory). This will only happen until the reverse voltage exceeds a threshold ampage, at which point the current will shoot up (in reverse).
Wiki User
∙ 16y ago
Wiki User
∙ 7y ago- with one polarity of voltage applied across an ideal diode it has zero resistance (forward)
- with the opposite polarity of voltage applied across an ideal diode it has infinite resistance (reverse)
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What is use of diode?
Diode is a two terminal semicon. Diode is a Switching device
How diode can be used as switch?
No, a diode can rectify an AC signal but is not able to amplify an AC signal. Diodes are two layer devices whereas transistors have three. It is this very thin 'base' region in the transistor that gives it the ability to give a voltage or current gain.
What is the use of PN diode?
there are many uses. one major use i remember is in rectification i.e convert ac to dc For switch operation
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.
What is the purpose of the Unijunction Transistor?
A Unijunction Transistor is a transistor that acts solely as a switch.
Does a zener diode acts as a switch?
A zener diode cannot be used as switch.
What is a device made of semiconductor material that acts like a switch controlling the flow of electrons in a chip?
if a diode is in forward biased the diode acts as switch is on and when we apply the diode in reverse biased then it work as the switch as off.
Can Crystal Diode acts as a Automatic Switch?
A diode typically has low resistance for current in one direction, and high resistance for current in the other direction. This is not really the description of anything that could be called a 'switch'.
How does a PN junction diode acts as a switch?
A diode is voltage and current sensitive it follows an exponential curve and lower then .6v it is considered off and above .6v is considered on.
What is use of diode?
Diode is a two terminal semicon. Diode is a Switching device
Can diode work as switch?
yes diode can be used as a switch as it conducts current in only one direction.it is a open switch when it reverse biased.and as aclosed switch when it is forward biased.but we consider diode as ideal .
What is similar to diode operation?
switch is similar to diode action
How does diode acts as a switch?
When the diode is reversed biased (positive charge applied to the N side and the negative charge applied to the P side) no current can flow just like when a switch is off. When the diode is forward biased (positive charge applied to the P side and the negative charge applied to the N side) no current can flow just like when a switch is on. Current can only flow in one direction.
What is the purpose of a diodes in a circuit?
a diode in a ckt basically acts like a switch!! it acts like a switch in on position i.e a short when forward biased and acts like a open ckt or a swich in off position when it is reversed biased!! its used inanalog circuits to generate different types of waves.........
How does a p-n junction diode work as a switch?
diode conducts in forward bias.so it is on switch. in reveres bias it will not conduct.so it is off switch
How diode can be used as switch?
No, a diode can rectify an AC signal but is not able to amplify an AC signal. Diodes are two layer devices whereas transistors have three. It is this very thin 'base' region in the transistor that gives it the ability to give a voltage or current gain.
What is use of the diode?
The use of the pn diode is for rectification. It can also be used as a switch.
