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Assertion: An N- type semiconductor has a large number of electrons but still it is electrically neutral.
Reason: An N-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.
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Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits
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Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an -type semiconductor, the density of electrons is and their mobility is , then the resistivity of the semiconductor (since it is an -type semiconductor contribution of holes is ignored) is close to:
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The electron concentration in an undefined -type semiconductor is the same as hole concentration in a undefined -type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
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Which of the following does not give type properties to a semiconductor when used as a doping agent?
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If the temperature of the semi-conductor is increased, which of the following is correct statement?
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The density of an electron-hole pair in pure germanium is at room temperature. On doping with aluminium, the hole density increases to . Now the electron density (in ) in doped germanium will be
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The dominant contribution to current comes from holes in case of
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Statement I: By doping silicon semiconductors with pentavalent material, the electrons density increases.
Statement II: The type of semiconductor has a net negative charge.
In the above statements, choose the most appropriate answer from the options given below:
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In n-type semiconductor, the majority charge carriers are
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For extrinsic semiconductors; when doping level is increased;
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An extrinsic semiconductor with electrons as majority carriers can be obtained by doping Ge or Si with
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The majority charge carriers in P-type semiconductors are
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An intrinsic semiconductor is converted into -type extrinsic semiconductor by doping it with:-
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In an N-type semiconductor, there are:
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In type silicon, which of the following statements is true?
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When indium is doped to silicon as impurity, the resulting material is
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In -type semiconductor, Silicon is doped with
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In an n-type silicon, which of the following statement is true?
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In a semiconductor, the concentration of minority carriers depends mainly on
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A donor impurity results in
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For a type semiconductor, which of the following statements is true?
