29. NCERT Exemplar XIII

1. In an electroscope, if a negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge. If now another charged object carrying an equal amount of positive charge is brought in contact with the clip, what will happen?

 

If a positively charged object is brought in contact with the metal clip of an electroscope, the negative charge provided earlier to the clip will be reducedneutralisedincreased and the diverged strips will contractwill repel.

 

2. Explain how does lightning conductor protect a building from getting struck by lightning.

 

Lightning conductor does not allowdoes allow charges to accumulate on a building and does not transfertransfers all the charges to the earth. This helps to protect the building from being struck by lightning.