Lesson Worksheet: Diodes Physics • 9th Grade
In this worksheet, we will practice describing how diodes work and identifying materials used in their construction.
Q1:
Which of the following materials is a semiconductor that is often used to make diodes?
- ANeon
- BLithium
- CSilicon
- DIridium
- ECopper
Q2:
Which of the following correctly describes a p-type semiconductor?
- AA p-type semiconductor is a semiconductor material that carries a net negative charge.
- BA p-type semiconductor is a semiconductor material that carries a net positive charge.
- CA p-type semiconductor is a semiconductor material that contains an impurity such that there are fewer free electrons in the material than there would be in the pure semiconductor.
- DA p-type semiconductor is a semiconductor material that contains an impurity such that there are more free electrons in the material than there would be in the pure semiconductor.
- EA p-type semiconductor is a semiconductor made from an element in period 3 of the periodic table.
Q3:
Which of the following correctly describes a diode?
- AA diode is an electronic component that emits light with a very high efficiency.
- BA diode is an electronic component that only allows current to flow in one direction through it.
- CA diode is an electronic component that can be used to amplify electronic signals.
- DA diode is an electronic component with a resistance that changes depending on the ambient temperature.
- EA diode is an electronic component with a resistance that changes depending on how much light is incident upon it.
Q4:
Which of the following correctly describes an n-type semiconductor?
- AAn n-type semiconductor is a semiconductor made from an element in period 5 of the periodic table.
- BAn n-type semiconductor is a semiconductor material that contains an impurity such that there are more free electrons in the material than there would be in the pure semiconductor.
- CAn n-type semiconductor is a semiconductor material that carries a net negative charge.
- DAn n-type semiconductor is a semiconductor material that contains an impurity such that there are fewer free electrons in the material than there would be in the pure semiconductor.
- EAn n-type semiconductor is a semiconductor made from an element in period 4 of the periodic table.
Q5:
A p–n junction consists of 2 different types of semiconductors: a p-type semiconductor and an n-type semiconductor. The p-type semiconductor has free electrons than a pure semiconductor, and the n-type semiconductor has free electrons than a pure semiconductor. Where the p-type and n-type semiconductors are joined, electrons from the semiconductor recombine with electron holes from the semiconductor, creating a region between the two materials which acts as a/an .
- Afewer, more, n-type, p-type, insulator
- Bfewer, more, p-type, n-type, insulator
- Cmore, fewer, n-type, p-type, conductor
- Dfewer, more, p-type, n-type, conductor
- Emore, fewer, n-type, p-type, insulator
Q6:
The graph shows the - characteristics of a diode.
At which of the points marked on the graph is the resistance of the diode highest?
- A
- B
- C
- D
At which of the points marked on the graph is the resistance of the diode lowest?
- A
- B
- C
- D
Q7:
Which of the following circuit symbols represents a diode?
- A
- B
- C
- D
- E
Q8:
Which of the following diagrams correctly shows the direction in which a diode will permit a current?
- A
- B
Q9:
The diagram shows a circuit containing several diodes and bulbs. All of the bulbs are connected in parallel with the cell. Which of the bulbs, if any, are lit?
- ABulb 1
- BBulb 2
- CBulb 1 and bulb 2
- DBulb 3
- ENone of the bulbs are lit.
Q10:
The diagram shows a circuit containing several diodes and resistors. All of the resistors are connected in parallel with the cell. Through which resistors, if any, is the current nonzero?
- A
- B
- C and
- D
- ENone of the resistors have a nonzero current.
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