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Digital Electronics: Review of Basic Electronics Diodes

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Digital Electronics: Review of Basic Electronics Diodes

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Questions and Answers

What is the function of a diode in an electrical circuit?

To conduct current in both directions

To increase resistance in one direction and decrease it in the other

To have negligible resistance in both directions

To allow current flow in one direction and prevent it in the other (correct)

What is the representation of the positive terminal of a diode?

A (correct)

What is the ideal resistance of a diode in one direction and the reverse direction, respectively?

Zero, zero (correct)

Infinite, infinite

Zero, infinite

Infinite, zero

What type of diode is the most common?

Semiconductor diode Signup and view all the answers

How are the anode and cathode of a practical diode identified?

By a fine line drawn on the diode Signup and view all the answers

What is a semiconductor diode also called?

Rectifier Signup and view all the answers

What is added to an intrinsic semiconductor to make it a p-type semiconductor?

Trivalent impurities like Aluminium, Indium and Gallium Signup and view all the answers

What is the majority carrier in a p-type semiconductor?

Holes Signup and view all the answers

What is added to a pure semiconductor to make it an n-type semiconductor?

Pentavalent impurities like Arsenic, Antimony, Bismuth Signup and view all the answers

What is the majority carrier in an n-type semiconductor?

Electrons Signup and view all the answers

What happens when a P-type and an N-type material are brought close to each other?

They join to form a junction Signup and view all the answers

What is formed in the region where the positive and negative ions are created near the PN junction?

A narrow charged region Signup and view all the answers

What is another name for the region between P and N type materials in the PN junction?

Barrier junction Signup and view all the answers

What does the depletion region in the PN junction do?

Depletes both the regions of movable charge carriers Signup and view all the answers

What is the result of the formation of negative ions on P-side and positive ions on N-side in the PN junction?

Formation of a narrow charged region on either side of the PN junction Signup and view all the answers

What is the potential difference across the junction called, due to the formation of ions?

Potential Barrier Signup and view all the answers