एक सूचक यंत्र (indicating instrument) में, अनुक्रिया समय (time of response) मुख्य रूप से निम्नलिखित में से किसके द्वारा निर्धारित होता है?

What is the purpose of the copper shading bands in an induction type energy meter?

Which of the following measuring instruments is classified as an integrating type instrument?

In a potential transformer, the ratio error and phase angle error are lowest when the burden value is ________.