Semiconductors and Superconductors
Physics ⇒ Modern Physics
Semiconductors and Superconductors starts at 11 and continues till grade 12.
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See sample questions for grade 12
A sample of silicon is doped with phosphorus. What type of semiconductor is formed?
A semiconductor has an equal number of electrons and holes. Is it intrinsic or extrinsic?
A student measures the resistance of a material as a function of temperature and finds that it drops to zero at 7 K. What can be concluded about the material?
A superconductor is cooled below its critical temperature in the presence of a magnetic field. What happens to the magnetic field inside the superconductor?
Calculate the number of holes created when one atom of boron is added to pure silicon.
Calculate the number of valence electrons in a silicon atom.
Describe the role of Cooper pairs in superconductivity.
Describe what happens to the resistance of a superconductor as it is cooled below its critical temperature.
Explain the difference between n-type and p-type semiconductors.
Explain why pure silicon is not a good conductor at room temperature.
Explain why superconductors are used in maglev trains.
If a semiconductor is doped with a pentavalent element, what type of charge carrier increases?
Name one application of superconductors in modern technology.
State the Meissner effect in superconductors.
