Lakshya Education MCQs

Question: The skin effect of a conductor will reduce as the
Options:
A.Resistivity of conductor material increases
B.Permeability of conductor material increases
C.Diameter increases
D.Frequency increases
Answer: Option A

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More Questions on This Topic :

Question 1. Which of the following is the demerit of a 'constant voltage transmission system'?
  1.    Increase of short-circuit current of the system
  2.    Availability of steady voltage at all loads at the line terminals
  3.    Possibility of better protection for the line due to possible use of higher terminal reactants
  4.    Improvement of power factor at times of moderate and heavy loads
Answer: Option A
Question 2. Electromechanical voltage regulators are generally used in
  1.    Reactors
  2.    Generators
  3.    Transformers
  4.    All of the above
Answer: Option B
Question 3. The presence of ozone due to corona is harmful because it
  1.    Reduces power factor
  2.    Corrodes the material
  3.    Gives odour
  4.    Transfer energy to the ground
Answer: Option B
Question 4. The spacing between phase conductors of a 220 kV line is approximately equal to
  1.    2 m
  2.    3.5 m
  3.    6 m
  4.    8.5 m
Answer: Option C
Question 5. Owing to skin effect
  1.    Current flows through the half cross-section of the conductor
  2.    Portion of the conductor near the surface carries more current and core of the conductor carries less current
  3.    Portion of the conductor near the surface carries less current and core of the conductor carries more current
  4.    Any of the above
Answer: Option B
Question 6. Which of the following D.C. distribution system is the simplest and lowest in first cost?
  1.    Radial system
  2.    Ring system
  3.    Interconnected system
  4.    None of the above
Answer: Option A

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