Electronic Devices - Semiconductors - Discussion
Discussion Forum : Semiconductors - General Questions (Q.No. 22)
22.
As the forward current through a silicon diode increases, the voltage across the diode
Discussion:
13 comments Page 1 of 2.
Prithvi said:
1 decade ago
How? why will it remain constant?
Ramyabalu said:
1 decade ago
It can be explained by forward bias characteristics of diode where current will be constantly increasing after crossing barrier potential with some slope. Hence it is relatively constant.
Mohana raga deepthi said:
1 decade ago
At the initial stage when there the voltage applied crosses the barrier potential then there is increase in current but will reach to a constant value. After that the increase in current flow will be due to increase in the voltage applied.
Piyush said:
1 decade ago
Upto 0.7 volts (x axis) current are relatively zero while applied voltages goes beyond 0.7 volt, current (y axis) going repidly high by very small variation in voltage (say delta v).
Hence the option is C.
Hence the option is C.
Girish Kumar said:
1 decade ago
We can explain it with the help of forward bias characteristics of diode that when a forward voltage reached a constant value as 0.3 and 0.7 then a large current flow in diode but voltage across diode will remain constant.
(1)
Rupam said:
1 decade ago
A/C to me voltage is always directly proportional to the current so that as we increase the voltage applied the current increases.
Priya said:
1 decade ago
@Girish
why that voltage across the diode remains constant?
why that voltage across the diode remains constant?
Peyush said:
1 decade ago
Diode current, Id = Is e^(Vd/Vt)
or, diode voltage, Vd = Vt ln(Id/Is)
with increase in Id, voltage Vd increases but at a very lesser rate as compared to Id. Hence we can say that the voltage is relatively constant.
or, diode voltage, Vd = Vt ln(Id/Is)
with increase in Id, voltage Vd increases but at a very lesser rate as compared to Id. Hence we can say that the voltage is relatively constant.
Jonathan said:
9 years ago
How? I am not getting this.
Please explain me in detail.
Please explain me in detail.
Vikas said:
8 years ago
Please explain it clearly.
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