प्लेट अर्थिंग (plate earthing) के लिए मानक विद्युत स्थापना प्रथाओं के अनुसार, पृथ्वी में प्लेट की गहराई ______ से कम नहीं होनी चाहिए।

What is the primary purpose of measuring the electrode resistance during the installation of an earthing system?

In the context of electrical earthing systems, what is meant by 'earth resistance'?

Read the Assertion (A) and Reason (R) carefully, and select the correct option. Assertion (A): The earth resistance must be kept as low as possible to ensure that the earthing system is effective during fault conditions. Reason (R): A low resistance allows fault current to flow easily into the ground, ensuring safety by preventing electrical hazards.