यदि किसी विद्युत परिपथ में ऊर्जा या विद्युत वाहक बल (EMF) का कोई स्रोत नहीं होता है, तो इसे किस रूप में जाना जाता है?

Gases become good conductors of electricity under which of the following conditions?

Which of the following conditions correctly describes the application of Kirchhoff's Voltage Law (KVL)?

Which of the following instruments is primarily used for detecting and measuring very small electric currents?