एक वोल्टमीटर में गुणक प्रतिरोध (multiplier resistance) और मीटर कॉइल किस प्रकार जुड़े होते हैं?

When two alternators are synchronized using a moving-iron synchroscope, on what does the speed and direction of rotation of the synchroscope pointer depend?

Which of the following instruments is primarily used to measure high insulation resistance?