Question

Q11. For dielectric heating the range of frequency normally employed is
O (A) 1 MHz to 10 MHz
O (B) 100 kHz to 10 MHz
O (C) 10 kHz to 100 kHz
(D) 10 kHz to 40 kHz​

Answer 1

Answer:

Q11. For dielectric heating the range of frequency normally employed is

(B) 100 kHz to 10 MHz

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Answer 2

The correct option is (A).

• The breakdown voltage of the dielectric is low.
• The dielectric is thin so it is overheated with a small increase of frequency.
• When we use high voltage molecules of the dielectric arranged within the line with one another. in this arrangement they rub against each other and produce frictional heating.
• So, high frequency causes heating and damage to the dielectric.
• Henceforth, for dielectric heating the range of frequency normally employed is between 1 MHz to 10 MHz.