WorksheetsCharacteristics of P-N Junction
Total questions: 10
Worksheet time: 5mins
What is the depletion region in a PN junction?
A region full of free electrons and holes
A region with no mobile charge carriers
A region with only free electrons
A region that conducts electricity freely
What is the threshold voltage for silicon in a PN junction?
0.3 V
0.7 V
1.2 V
2.0 V
What is the threshold voltage for germanium in a PN junction?
0.1 V
0.3 V
0.7 V
1.0 V
What happens when a forward-biased voltage is applied to a PN junction?
The depletion region widens.
The depletion region narrows.
Current flow is blocked.
The PN junction behaves like an insulator.
What is the effect of reverse-biased voltage on a PN junction?
It narrows the depletion region.
It widens the depletion region.
It increases the forward current.
It decreases junction resistance.
Under forward bias, the depletion region:
Expands
Narrows
Remains unchanged
Disappears completely
Under reverse bias, the depletion region:
Narrows
Expands
Remains unchanged
Collapses
The junction resistance under forward bias is:
High
Low
Zero
Infinite
The junction resistance under reverse bias is:
High
Low
Zero
Infinite
What occurs at the breakdown voltage in a reverse-biased PN junction?
Current flow stops entirely.
The depletion region becomes infinite.
A sudden increase in reverse current occurs.
The junction becomes an insulator.
