HV Exit Exam • Set 4 Question 20 of 30

The electric field strength (voltage gradient) at which electrical breakdown occurs in an insulating medium is called its:

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Direct Answer

Option B: Dielectric strength

Dielectric strength is the maximum electric field an insulating material can withstand without electrical breakdown, typically expressed in kV/mm or MV/m.

All Options

Breakdown voltage

Dielectric strength (Correct Answer)

Polarisation coefficient

Permittivity gradient

Detailed Explanation & Context

Dielectric strength is the maximum electric field an insulating material can withstand without electrical breakdown, typically expressed in kV/mm or MV/m.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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