डिस्चार्ज के दौरान एक विद्युत बैटरी के अंदर मुख्य रूप से किस प्रकार का ऊर्जा रूपांतरण होता है?

Which of the following devices does NOT convert energy from one form to another?

In a hydroelectric power station, which energy of flowing water is ultimately converted into electrical energy?

Electrical energy is converted into mechanical energy in which of the following devices?