How is the Electric Field Established Inside a Diode When Voltage is Applied?

In summary, an electric field in a diode is a force caused by the difference in potential between the two terminals of the diode. It controls the flow of electric current and is created by the difference in potential between the p and n-type regions of the diode. The strength of the electric field can be affected by the doping concentration, size of the diode, and applied voltage. It can be measured using an electric field meter that displays the strength in volts per meter.
  • #1
tonyjk
227
3
Hello,

When a Voltage is applied to a diode, how the electric field is established inside the diode? Is it the same as a resistor which surface charges density establish electric field inside it?

Thanks
 
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  • #2
Resistors are not semiconductors and do not attract the charge carriers to their opposite polarity pole.
 
  • #3
tonyjk said:
Hello,

When a Voltage is applied to a diode, how the electric field is established inside the diode?
Ignoring variable magnetic field it is established as E = -grad V
 

FAQ: How is the Electric Field Established Inside a Diode When Voltage is Applied?

1. What is an electric field in a diode?

An electric field in a diode is a region of space surrounding the diode where electric charges experience a force. This force is caused by the difference in potential between the two terminals of the diode.

2. How does the electric field affect the behavior of a diode?

The electric field in a diode controls the flow of electric current. When the electric field is applied in the correct direction, it allows current to flow through the diode. However, when the electric field is applied in the opposite direction, it blocks the flow of current.

3. How is the electric field created in a diode?

The electric field in a diode is created by the difference in potential between the p and n-type regions of the diode. This potential difference is created by the doping process during the manufacturing of the diode.

4. What factors can affect the strength of the electric field in a diode?

The strength of the electric field in a diode can be affected by the doping concentration, the size of the diode, and the magnitude of the applied voltage. Higher doping concentrations and larger diode sizes typically result in a stronger electric field.

5. How is the electric field in a diode measured?

The electric field in a diode can be measured using a device called an electric field meter. This device uses the principle of Coulomb's law to measure the strength of the electric field. It consists of a probe that is placed near the diode and connected to a meter that displays the electric field strength in units of volts per meter (V/m).

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