Categories: Mcq's and Quires

MCQ’s| Electrons|Atomic | Voltage |Thevenin’s

Mcqs of electronics of the first chapter which are most important and usually this type of Mcqs of electronics coms in job tests not all of them but 2 or 3 from this post. these Mcqs of electronics are prepared for the learners who are now trying to get a job.

  1. The outermost orbit of an atom may have a maximum of ………….. electrons.
    (i)8                                  (ii) 6                         (iii)4                                (iv) 3
  1. When the outermost orbit of an atom has blow than 4 electrons, the matter is generally known as …………..
    (i) non-metal                 (ii) metal             (iii) semiconductor           (iv) none of above
  1. The valence or last shell electrons have …………..
    (i) very small energy      (ii) least energy     (iii) maximum energy    (iv) none of the above
  1. A huge number of free electrons exist in …………..
    (i) semiconductors                  (ii) metals              (iii) insulators           (iv) non-metals
  1. An ideal voltage supply or source has ………….. internal resistance.
    (i) small                         (ii) large                     (iii) infinite                      (iv) zero
  1. An ideal current source or supply has ………….. internal resistance.
    (i) infinite                 (ii) zero               (iii) small                 (iv) none of the above
  1. Maximum power is transferred or delivered if the load resistance is equal to ………. of the source.
    (i) half the internal resistance                  (ii) internal resistance                                       (iii) twice the internal resistance              (iv) none of the above
  1. Efficiency at maximum power delivered is …………..
    (i) 75%                  (ii) 25%                  (iii) 90%               (iv) 50%
  1. When the outermost orbit of an atom has exactly equal to the 4 valence electrons, that matter is generally …………..
    (i) a metal              (ii) a non-metal             (iii) a semiconductor             (iv) an insulator
  1. Thevenin’s theorem replaces or transfers a complicated circuit facing a load by an …………..
    (i) ideal voltage source and parallel resistor
    (ii) ideal current source and parallel resistor
    (iii) ideal current source and series resistor                                                                       (iv)ideal voltage source and series resistor
  1. The output voltage supply of an ideal voltage source is …………..
    (i) zero                                                         (ii) constant
    (iii) dependent on load resistance               (iv) dependent on the internal resistance
  1. The current output supply of an ideal current source is …………..
    (i) zero                                                          (ii) constant
    (iii) dependent on load resistance                (iv) dependent on internal resistance
  1. Norton’s theorem replaces or changes a complicated circuit facing a load by an …………..
    (i) ideal voltage source and parallel resistor
    (ii) ideal current source and parallel resistor
    (iii) ideal voltage source and series resistor
    (iv) ideal current source and series resistor
  1. The practical example of the ideal voltage supply is …………..
    (i) lead-acid cell                     (ii) dry cell
    (iii) Daniel cell                       (iv) none of the above
  1. The electrons speed in a vacuum is ………….. than in a conductor.
    (i) less                                 (ii) much more
    (iii) much less                     (iv) none of the above
  1. Maximum power will be delivered from a source of 10 Ω resistance to a load of …………..
    (i) 5 Ω                       (ii) 20 Ω
    (iii) 10 Ω                   (iv) 40 Ω
  1. When the outermost orbit of an atom has greater than four electrons, that matter is normally a …………..
    (i) metal                       (ii) non-metal
    (iii) semiconductor           (iv) none of the above
  1. Ideal supply having of 5 V in series with 10 k ohm resistance. The current magnitude of the equivalent current source is …………..

(i) 2 mA                (ii) 3.5 mA

           (iii) 0.5 mA            (iv) none of the above

  1. To achieve Thevenin voltage, you have to…………..

(i) short the load resistor                (ii) open the load resistor

(iii) short the voltage source          (iv) open the voltage source

  1. To achieve the Norton current, you have to…………..

(i) short the load resistor           (ii) open the load resistor

(iii) short the voltage source     (iv) open the voltage source

  1. The open-circuited voltage at the load RL terminals in a circuit is 30 V. Under the conditions of maximum power delivered, the load voltage will be …………..

(i) 30 V                     (ii) 10 V            (iii) 5 V                     (iv) 15 V

  1. Under the conditions of maximum power delivered, a voltage supply is transferring power of 30 W to the load. The power generated by the source is …………..

 (i) 45 W          (ii) 60 W                   (iii) 30 W            (iv) 90 W

  1. The maximum power transfer or delivered theorem is used in …………..
    (i) electronic circuits
    (ii) power system
    (iii) home lighting circuits
    (iv) none of the above
  1. The Norton resistance of a circuit is 20 Ω and the shorted-load current is 2 A. If the network is loaded by a resistance may be equal to 20 Ω, the current passes through the load will be…………..
    (i) 2 A                          (ii) 0.5 A
    (iii) 4 A                        (iv) 1 A
  1. The Norton current is also sometimes known as…………..
    (i) shorted-load current
    (ii) open-load current
    (iii) Thevenin current
    (iv) Thevenin voltage

Answers to Mcqs of electronics

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Norton’s Theorem | Chassis and Ground| Properties

Thevenin’s Theorem | Properties | Problems

Maximum Power Transfer Theorem |Applications

Conversion of Voltage Source into constant Current Source

Free Electrons | Voltage Source | Constant Voltage Source

Conversion of Voltage Source into constant Current Source

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Raheem Kolachi

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