8) What is the purpose of covering provided over the electrical conductor?

Increase current flow

Reduce current flow

Decrease voltage rating

Protection against weather

Answer is:

Protection against weather

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9) Which cores are used in intermediate frequency transformers?

Steel

Nickel

Cobalt

Ferrite

Answer is:

Ferrite

10) Which material conducts electricity?

Mica

Paper

Glass

Copper

Answer is:

Copper

Explanation:

Key Properties of Copper
Excellent heat conductivity.
Excellent electrical conductivity.
Good corrosion resistance.
Good biofouling resistance.
Good machinability.
Retention of mechanical and electrical properties at cryogenic temperatures.
Non-magnetic

11) How many electrons are contained in coulomb of electric charge?

6.25 x 108 electrons

6.25 x 1012 electrons

6.25 x 1016 electrons

6.25 x 1018 electrons

Answer is:

6.25 x 1018 electrons

12) What is the percentage of conductivity of electric current in silver?

0.56

0.67

0.94

Answer is:

1 Basics of AC and Electrical Cables MCQ with Answers

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