P-N Junction Flashcards

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1
Q

Where is the depletion region located?

A

Located between an N-type & P-type S.C. (Consists of -ve and +ve charge)

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2
Q

Which directions does the Depletion Region point?

A

Depletion Region points from the inner edge of the N-type to the Inner P-type S.C
(+ve → -ve)

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3
Q

P-N junctions consists of three different bias. What are they? State what happens in each of them.

A

1) No Bias = No battery = No Current flow

2) Forward Bias = (+ve → +ve, -ve → -ve), The Depletion Region Shrinks

3) Reverse Bias = (-ve → +ve), The Depletion Region Widens = Short Circuit

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4
Q

What are Diodes?

A

Their a type of Extrinsic S.C, and are in the P-N junctions.

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5
Q

In a graph with data of a Valence and Conduction Band, where does the band Gap occur?

A

The Band Gap occurs where the Energy is = 0

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6
Q

When does a graph with a V.B & C.B represent an Insulator? i.e what value

A

When the Band Gap (Energy = 0) > 3eV

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7
Q

When the Band Gap (Energy = 0) in a graph is < 3eV, what does it represent?

A

Semi-Conductor

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8
Q

How does a graph with a V.B & C.B represent a Conductor?

A

If the Band Gap doesn’t cross in the graph, since Conductors band gap = 0 (don’t have one)

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9
Q

If the Bang Gap is = 4eV, what is it?

A

Insulator

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10
Q

When the band Gap is = 3eV, what is it?

A

Semi-Conductor

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11
Q

In Forward Bias, which way does the Electric Field travel? **

A

Electric Field always occurs/flows to inside the N-type S.C → Inside the P-type S.C**

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12
Q

In Reverse Bias which way do the electrons flow?

A

Electrons flow away from the Electric Field

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13
Q

Which is larger: Depletion Region (Forward Bias) Or Depletion Region (Reverse Bias)?

A

Depletion Region (Reverse Bias) > Depletion Region (Forward Bias)

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