Q5: Choose A or B A) A solid specimen of dielectric, dielectric constant of 4.5, shown in the figure has an internal void of thickness Imm. The specimen is 1cm thick and is subjected to a voltage of 100 kV(rms). If the void is filled with air and if the breakdown strength of air can be taken as 35 kV(peak)/cm, find the voltage at which an internal discharge can occur.

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Q5: Choose A or B
A) A solid specimen of dielectric, dielectric constant of 4.5, shown in the figure has an internal
void of thickness 1mm. The specimen is 1cm thick and is subjected to a voltage of 100
kV(rms). If the void is filled with air and if the breakdown strength of air can be taken as
35 kV(peak)/cm, find the voltage at which an internal discharge can occur.
Iimm 10 mm
100KV
(RMS)
B) A solid specimen of dielectric has a dielectric constant of 4.2, and tan 8 = 0.001 at a
frequency of 50 Hz. If it is subjected to an alternating field of 50 kV/cm, calculate the heat
generated in the specimen due to the dielectric loss.
Transcribed Image Text:Q5: Choose A or B A) A solid specimen of dielectric, dielectric constant of 4.5, shown in the figure has an internal void of thickness 1mm. The specimen is 1cm thick and is subjected to a voltage of 100 kV(rms). If the void is filled with air and if the breakdown strength of air can be taken as 35 kV(peak)/cm, find the voltage at which an internal discharge can occur. Iimm 10 mm 100KV (RMS) B) A solid specimen of dielectric has a dielectric constant of 4.2, and tan 8 = 0.001 at a frequency of 50 Hz. If it is subjected to an alternating field of 50 kV/cm, calculate the heat generated in the specimen due to the dielectric loss.
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