Contents
Is current flow of electrons or holes?
The flow of electrons is termed electron current. Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative.
How do electrons move through a diode?
Yes, both electrons and holes flow in a pn junction diode. They flow in opposite directions to each other under both positive and negative applied voltage. Under positive voltage the electrons flow from the n side to the p side through the depletion region.
Do Diodes allow current to pass through it both ways?
Current passing through a diode can only go in one direction, called the forward direction. Current trying to flow the reverse direction is blocked. They’re like the one-way valve of electronics.
How hole is created during current flow?
In a circuit, holes current is produced when electrons in a semiconductor are taken away by the positive terminal. However, holes can be seen as imaginary particles that bear positive charge and travel in the opposite direction from the positive to the negative terminal.
Which way do diodes work?
Diodes only allow current to flow in one direction, and they’re always polarized. A diode has two terminals. The positive side is called the anode, and the negative one is called the cathode.
How are the currents carried in a transistor?
Transistor Currents. We know that in transistors and diodes, electric current is carried by both free electrons and holes. Free electrons and holes travel in opposite directions. For example, if free electrons flow from left to right then the holes will flow from right to left.
How are electrons diffused in a solid state diode?
The electrons which cross the PN junction into the p-type material (or holes which cross into the n-type material) will diffuse in the near-neutral region. Therefore, the amount of minority diffusion in the near-neutral zones determines the amount of current that may flow through the diode.
Which is the correct direction of the electric current?
So the electric current direction is from positive to negative. However, after the discovery of electrons and protons, scientists realized that the conventional current direction is wrong. The electric current is actually carried by the free electrons which flow from negative to positive.
Where do electrons diffuse in a p-type semiconductor?
At the junction of p-type and n-type semiconductors, higher concentration of electrons in the n-type region near the PN interface tend to diffuse into the p-type region. As electrons diffuse, they leave positively charged ions (donors) in the n region.