Physics MCQs for NEET — Practice Questions with Answers

  Its resistance is decreased

  It becomes a p-type semiconductor

  There will be less free-electron than holes in semiconductor

  All of these are correct

  Depletion region becomes thick

  p-side is at a higher potential than n side

  Current flowing is zero

  Effective resistance is of the order of ${10}^6\mathrm{W}$

  Electron is majority carriers and trivalent atoms are dopants.

  Electrons are majority carriers and pentavalent atoms are dopants.

  Holes are majority carriers and pentavalent atoms are dopants.

  Holes are majority carriers and trivalent atoms are dopants.

  ${\mathrm{n}}_1 = {\mathrm{n}}_{\mathrm{e}} = {\mathrm{n}}_{\mathrm{h}}$

  ${{\mathrm{n}}_{\mathrm{i}}}^2 = {\mathrm{n}}_{\mathrm{e}}{\mathrm{n}}_{\mathrm{h}}$

  ${\mathrm{n}}_{\mathrm{h}} >> {\mathrm{n}}_{\mathrm{e}}$

  ${\mathrm{n}}_{\mathrm{h}} << {\mathrm{n}}_{\mathrm{e}}$

  $\mathrm{e}\left[{\mathrm{n}}_{\mathrm{e}}{\mathrm{m}}_{\mathrm{h}} + {\mathrm{n}}_{\mathrm{e}}{\mathrm{m}}_{\mathrm{e}}\right]$

  $\mathrm{e}\left[{\mathrm{n}}_{\mathrm{e}}{\mathrm{m}}_{\mathrm{e}} + {\mathrm{n}}_{\mathrm{h}}{\mathrm{m}}_{\mathrm{e}}\right]$

  ${\mathrm{en}}_{\mathrm{e}}\left[{\mathrm{m}}_{\mathrm{e}} + {\mathrm{m}}_{\mathrm{h}}\right]$

  $\mathrm{e}\left[{\mathrm{n}}_{\mathrm{e}}{\mathrm{m}}_{\mathrm{e}} + {\mathrm{n}}_{\mathrm{h}}{\mathrm{m}}_{\mathrm{h}}\right]$

  N-type

  P-type

  intrinsic

  insulator

Electrons are majority carriers and trivalent atoms are dopants

Electrons are minority carriers and pentavalent atoms are dopants

Holes are minority carriers and pentavalent atoms are dopants

Holes are majority carriers and trivalent atoms are dopants

the antimony becomes an acceptor atom

there will be more free electrons than holes in the semiconductor

its resistance is increased

it becomes a p-type semiconductor

the positive terminal of the battery is connected to n-side and the depletion region becomes thin

the positive terminal of the battery is connected to n-side and the depletion region becomes thick

the positive terminal of the battery is connected to p-side and the depletion region becomes thin

 the positive terminal of the battery is connected to p-side and the depletion region becomes thick

n-type with electron concentration $n_{\mathit{e}}=5\times {10}^{22} {\mathrm{m}}^{-3}$

p-type with electron concentration $n_{\mathit{e}}=2.5\times {10}^{23} {\mathrm{m}}^{-3}$

 n-type with electron concentration $n_e=2.5\times {10}^{10} {\mathrm{m}}^{-3}$

 p-type with electron concentration $n_e=5\times {10}^9 {\mathrm{m}}^{-3}$