उत्तर : 2. "1 वोल्ट = 1 जुल /1 कूलाम"
व्याख्या :

1 volt = 1 joule / 1 coulomb

This equation represents the definition of voltage (in volts). It states that one volt is equal to one joule of energy per one coulomb of charge. Voltage measures the electric potential difference between two points and is a fundamental concept in electrical physics.