9) Which cores are used in intermediate frequency transformers?

Answer is:

Ferrite

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10) Which material conducts electricity?

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?

Answer is:

6.25 x 1018 electrons

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

Answer is:

1

13) What is the percentage of conductivity of electric current in aluminium?

Answer is:

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