Electronic Devices and Circuits MCQs with answers Page - 1

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Q. Superposition theorem is based on

  • (A) reciprocity
  • (B) duality
  • (C) non-linearity
  • (D) linearity

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Q. The Norton current is sometimes called the

  • (A) shorted-load current
  • (B) open-load current
  • (C) thevenin current
  • (D) thevenin voltage

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Q. Kirchhoff s current law states that

  • (A) net current flow at the junction is positive
  • (B) hebraic sum of the currents meeting at the junction is zero
  • (C) no current can leave the junction without some current entering it.
  • (D) total sum of currents meeting at the junction is zero

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Q. According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always

  • (A) negative
  • (B) positive
  • (C) determined by battery e.m.fs.
  • (D) zero

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Q. Kirchhoffs current law is applicable to only

  • (A) junction in a network
  • (B) closed loops in a network
  • (C) electric circuits
  • (D) electronic circuits

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Q. Kirchhoffs voltage law is related to

  • (A) junction currents
  • (B) battery e.m.fs.
  • (C) ir drops
  • (D) both (b) and (c)

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Q. Thevenin resistance Rth is found

  • (A) by removing voltage sources along with their internal resistances
  • (B) by short- circuiting the given two terminals
  • (C) between any two open terminals
  • (D) between same open terminals as for etk

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Q. An ideal voltage source should have

  • (A) large value of e.m.f.
  • (B) small value of e.m.f.
  • (C) zero source resistance
  • (D) infinite source resistance

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Q. In an npn transistor, the majority carriers in the emitter are

  • (A) free electrons
  • (B) holes
  • (C) neither
  • (D) both

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