State three advantages of LED over incandescent and fluorescent illuminating devices.

State three advantages of LED over incandescent and fluorescent illuminating devices.

---

(a) low power requirement
(b) High efficiency
(c) long life

---

maurice.mutuku answered the question on September 30, 2019 at 08:33

Exams With Marking Schemes

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 5
• Grade 6
• Grade 7
• Grade 8
• Grade 9
• PP1
• PP2
• Playgroup
• Form 1
• Form 2
• Form 3
• Form 4

Related Questions

---

• Differentiate between Core 2 Duo and Quad Core processors in terms of internal architecture (Solved)
  

  Differentiate between Core 2 Duo and Quad Core processors in terms of internal architecture

  Date posted: September 30, 2019 .    Answers (1)

• Define Macro (Solved)
  

  Define Macro

  Date posted: September 30, 2019 .    Answers (1)

• The traffic lights serve as output devices for a computerized traffic system. Name the appropriate input device for this system. (Solved)
  

  The traffic lights serve as output devices for a computerized traffic system. Name the appropriate input device for this system.

  Date posted: September 30, 2019 .    Answers (1)

• Describe three ways in which computers have positively impacted on education. (Solved)
  

  Describe three ways in which computers have positively impacted on education.

  Date posted: September 30, 2019 .    Answers (1)

• (a) What is the hexadecimal equivalent of 747₈(b) Use one’s compliment to solve 6₁₀ (Solved)
  

  (a) What is the hexadecimal equivalent of 747₈
  (b) Use one’s compliment to solve 6₁₀
  

  Date posted: September 30, 2019 .    Answers (1)

• Explain the meaning of the following terms as used in computer programming. i) Syntax ii) Semantics (Solved)
  

  Explain the meaning of the following terms as used in computer programming.
  i) Syntax
  ii) Semantics

  Date posted: September 30, 2019 .    Answers (1)

• State TWO circumstances under which interviews may be used as a method of gathering information (Solved)
  

  State TWO circumstances under which interviews may be used as a method of gathering information

  Date posted: September 30, 2019 .    Answers (1)

• Define an information system. (Solved)
  

  Define an information system.

  Date posted: September 30, 2019 .    Answers (1)

• Most computerized security systems make use of biometric analysis. Name Physical features of human being that can be considered for this analysis. (Solved)
  

  Most computerized security systems make use of biometric analysis. Name Physical features of human being that can be considered for this analysis.

  Date posted: September 30, 2019 .    Answers (1)

• Describe THREE computer crimes taking place in society citing control measures that can be put in place to curb them. (Solved)
  

  Describe THREE computer crimes taking place in society citing control measures that can be put in place to curb them.

  Date posted: September 30, 2019 .    Answers (1)

• Define the following terms as used in programming. (i) Array (ii) Algorithm (Solved)
  

  Define the following terms as used in programming.
  (i) Array
  
  (ii) Algorithm

  Date posted: September 30, 2019 .    Answers (1)

• (a) Name the stage of systems development life cycle where questionnaires are use.(b) State ONE advantage and ONE disadvantage of using questionnaires at the stage... (Solved)
  

  (a) Name the stage of systems development life cycle where questionnaires are use.
  
  (b) State ONE advantage and ONE disadvantage of using questionnaires at the stage in 15 (b) above.
  (i) Advantage
  (ii) Disadvantage

  Date posted: September 30, 2019 .    Answers (1)

• Carry out the following arithmetic in twos complement. 48₁₀ – 12₁₀ (Solved)
  

  Carry out the following arithmetic in twos complement.
  48₁₀ – 12₁₀

  Date posted: September 30, 2019 .    Answers (1)

• While purchasing computers for his school, the Principal of Matopeni High school preferred a 6 months warranty option other than that of 1 year from... (Solved)
  

  While purchasing computers for his school, the Principal of Matopeni High school preferred a 6 months warranty option other than that of 1 year from the selling company.
  List two factors that might have led him to do so.

  Date posted: September 30, 2019 .    Answers (1)

• State under which category of keyboard keys the following keys would fall. (Solved)
  

  State under which category of keyboard keys the following keys would fall.
  

  Date posted: September 30, 2019 .    Answers (1)

• Giving an example, name three categories of post secondary institutions where one can advance computer skills after sitting for K.C S .E. (Solved)
  

  Giving an example, name three categories of post secondary institutions where one can advance computer skills after sitting for K.C S .E.

  Date posted: September 30, 2019 .    Answers (1)

• The formula = $B2 + C$4 is entered in cell C5 and then copied to DI0, Write down the formula as it appears in the... (Solved)
  

  The formula = $B2 + C$4 is entered in cell C5 and then copied to DI0, Write down the formula as it appears in the destination cell.

  Date posted: September 30, 2019 .    Answers (1)

• Name any two advantages of solid-state memories over other storage media. (Solved)
  

  Name any two advantages of solid-state memories over other storage media.

  Date posted: September 30, 2019 .    Answers (1)

• Explain any two factors that should be considered during output design. (Solved)
  

  Explain any two factors that should be considered during output design.

  Date posted: September 30, 2019 .    Answers (1)

• Identify three advantages of using modular programming in system development. (Solved)
  

  Identify three advantages of using modular programming in system development.

  Date posted: September 30, 2019 .    Answers (1)