Question

Kavya observed that a discharged dry cell which kept in sunlight by her father for few hours got ability to glow LED. She got many doubts and questions to raise. Can you guess those questions or doubts? 

(OR) 

Rohan observed that a discharged dry cell which kept in sunlight by his brother for few hours got ability to glow LED. He got many doubts and questions to raise. Guess the doubts or questions.

Answer 1

1. Why does the bulb glow? 

2. How does the dry cell charged? 

3. Which energy is useful in charging the discharged dry cell? 

4. Shall we use that energy to get rid from electrical power cut?