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MCQs

Total Questions : 228 | Page 2 of 23 pages
Question 11. A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that
  1.    None of these
  2.    it operates much faster
  3.    it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
  4.    it is considerably larger
  5.    it is controlled by current rather than by voltage like a bipolar transistor.
 Discuss Question
Answer: Option C. -> it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
Question 12. De Morgan's second therm says that NAND gate is equivalent to a bubbled _____ gate.
  1.    XOR
  2.    None of these
  3.    XAND
  4.    OR
  5.    AND
 Discuss Question
Answer: Option D. -> OR
Question 13. What logic function is produced by adding an inverter to each input and the output of an AND gate?
  1.    NOR
  2.    OR
  3.    None of these
  4.    XOR
  5.    NAND
 Discuss Question
Answer: Option B. -> OR
Question 14. When a transistor is cut off or saturated, transistor _____ have almost no effect
  1.    stage
  2.    circuits
  3.    wave
  4.    None of these
  5.    variations
 Discuss Question
Answer: Option E. -> variations
Question 15. Express -7 as 16-bit signed binary numbers.
  1.    None of these
  2.    1000 0000 0000 0111
  3.    0111 0000 0000 0000
  4.    0000 0000 0000 0111
  5.    0111 0000 0000 0001
 Discuss Question
Answer: Option B. -> 1000 0000 0000 0111
Question 16. With an RS latch a high S and low R sets the output to _____ ; a low S and a high R _____ the output to low.
  1.    Race, high
  2.    set, reset
  3.    No change, set
  4.    None of these
  5.    high, reset
 Discuss Question
Answer: Option E. -> high, reset
Question 17. The output 0 and 1 levels for TTL logic family is approximately
  1.    0.9 and 1.75V
  2.    -1.75 and -0.9 V
  3.    0.6 and 3.5 V
  4.    0.1 and 5 V
  5.    None of these
 Discuss Question
Answer: Option C. -> 0.6 and 3.5 V
Question 18. What is the 2's complement of 0011 0101 1001 1100 number?
  1.    None of these
  2.    1100 1010 0110 0011
  3.    1100 1010 0110 0100
  4.    1100 1010 1100 1011
  5.    1100 1010 1111 1111
 Discuss Question
Answer: Option C. -> 1100 1010 0110 0100
Question 19. Flip-flop outputs are always
  1.    complimentary
  2.    None of these
  3.    same as inputs
  4.    independent of each other
  5.    the same
 Discuss Question
Answer: Option A. -> complimentary
Question 20. A _____ TTL device can sink up to 16mA and can source up to 400 MA.
  1.    Low-power
  2.    high-power
  3.    Schottky
  4.    None of these
  5.    Standard
 Discuss Question
Answer: Option E. -> Standard

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