Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Carrier Transport

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Intermediate

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1. Why does the conductor heat up when there's an electric field applied across it (given that there is a path for current to flow)?

a: It is the ambient heat taken up by the conductor Explanation

Explanation

b: There is probably IR light along with applied field Explanation

Explanation

c: Collisions between electrons and lattice atoms convert electrical energy into heat. Explanation

Explanation

d: Its not a conductor. Explanation

Explanation

2. Extrinsic Semiconductors conduct electricity because-

a: Dopant atom provide carriers easily due to low ionization energy Explanation

Explanation

b: The valence band of the atoms is completely filled Explanation

Explanation

c: Electrons in conduction band can move in electric field Explanation

Explanation

d: Both A and C Explanation

Explanation

3. What is the difference between n-type and p-type semiconductors?

a: n-type & p-type both are doped with pentavalent impurities Explanation

Explanation

b: n-type & p-type both are doped with trivalent impurities. Explanation

Explanation

c: n-type is doped with pentavalent impurities and p-type is doped with trivalent impurities Explanation

Explanation

d: n-type has holes a majority carriers and p-type has electrons as majority carriers Explanation

Explanation

4. Why does the charge move between n-type region and p-type region when new p-n junction is formed and there's no externally applied electric field?

a: Drift of charge Explanation

Explanation

b: Diffusion of charge Explanation

Explanation

c: High drift velocity Explanation

Explanation

d: External environment conditions Explanation

Explanation

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