What is cut in voltage of a PN Junction diode?

ii. Knee voltage: The applied forward voltage at which the PN junctions start conducting is called the cut-in voltage. It is also known as knee voltage (Vk or Vz). The value of cut-in voltage is 0.7 V for Silicon and 0.3 V for Germanium PN junction diodes.

How do you find the cut in voltage on a graph?

All Answers (3) Are you refering to cut-in voltage? In that case, the tangent to the curve at higher bias(>>3 KT/q, < 0.7 V) is extended to intercept the x axis. The x-intercept is the cut-in voltage.

What is the cut in voltage of Si diode?

0.7V
This silicon diode requires 0.7V to start the forward biasing and this is known as the cut in voltage.

How do you find the cut in voltage of a diode?

Here, V is the voltage across the diode and I is the current through the diode. We observe that at voltage, \[{\text{V}} = 0.7\,{\text{V}}\] the diode starts allowing high currents to pass through it. Therefore, the cut-in voltage for silicon diodes is \[0.7\,{\text{V}}\]. Hence, the correct answer is option B.

What is the cut in voltage at the p-n junction?

This Region gives rise to a potential barrier V called Cut- in Voltage. This is the voltage across the diode at which it starts conducting. It can conduct beyond this Potential. The P-N junction supports uni-directional current flow.

What happens to the current in a PN junction diode?

Here the interesting thing to note is that, diode does not conduct with change in applied voltage. The current remains constant at a negligibly small value (in the range of micro amps) for a long range of change in applied voltage. When the voltage is raised above a particular point, say 80 volts, the current suddenly shoots (increases suddenly).

When is the curve of a PN junction non linear?

When the diode is in forward bias, the current increases slowly and the curve obtained is non-linear as the voltage applied to the diode is overcoming the potential barrier. Once the potential barrier is overcome by the diode, the diode behaves normally and the curve rises sharply as the external voltage increases and the curve obtained is linear.

What are the vi characteristics of a PN junction?

The movement of charge carriers inside the pn junction is the reason behind the current flow in the circuit. VI characteristics of PN junction diode is a curve between the voltage and current through the circuit. Voltage is taken along the x-axis while the current is taken along the y-axis.