निम्नलिखित में से कौन सा किसी मापक यंत्र के 'डेड ज़ोन' (Dead zone) को सही ढंग से परिभाषित करता है?

On what fundamental basis does a mass spectrometer separate ions?

Which feature of a digital multimeter is used to automatically change its internal measurement range to detect the correct voltage, current, or resistance of a circuit?

Which device directly utilizes the Seebeck effect to convert a temperature difference into an electrical voltage signal?