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The maximum electric field strength above which an insulating material begins to break down and conduct is called _ strength.
Correct Answer: B — Dielectric
Explanation:
Explanation: Dielectric Strength Definition: Dielectric strength is the maximum electric field strength that an insulating material can withstand without breaking down or losing its insulating properties. It is a critical parameter in electrical engineering, particularly for materials used in capacitors, insulators, and other electrical components. When the electric field exceeds this limit, the material undergoes electrical breakdown, resulting in conduction and loss of insulating capabilities.