10 to 20 kV/mm
30 to 50 kV/mm
50 to 200 kV/mm
300 to 500 kV/mm
Answer is Right!
Answer is Wrong!
The correct answer is: C. 50 to 200 kV/mm
Dielectric strength is the maximum electric field strength that an insulating material can withstand without breaking down and becoming conductive. Mica is a very good insulator, with a dielectric strength of 50 to 200 kV/mm. This means that it can withstand an electric field strength of up to 200,000 volts per millimeter before it breaks down.
Option A is incorrect because the dielectric strength of mica is much higher than 10 to 20 kV/mm. Option B is incorrect because the dielectric strength of mica is much higher than 30 to 50 kV/mm. Option D is incorrect because the dielectric strength of mica is much lower than 300 to 500 kV/mm.