A gold leaf electroscope's cap develops a negative charge when a negatively charged rod is brought close to it; the case is then grounded, creating a negative charge in the leaf. Option D is correct.
When the matter is put in an electromagnetic field, it has an electric charge, which causes it to experience a force. A positive or negative electric charge can exist.
Similar charges repel each other, whereas dissimilar charges attract each other.
The term "neutral" refers to an item that has no net charge. A charge is something experienced as a force in the electric and magnetic fields.
When a negatively charged rod is brought near the cap of a gold leaf electroscope whose case ad then is earthed, then the leaf has an induced negative charge.
Hence option D is correct.
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