Question

2. Like charges repel and unlike charges 3. was the first Indian artificial satellite;​

Answer 1

2.Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges. The size of the force varies inversely as the square of the distance between the two charges.

3.The launch of India's first indigenous satellite, Aryabhata, 46 years ago on April 19, 1975, is celebrated as a landmark in the country's space programme. The satellite is named after the 5th century CE mathematician and astronomer Aryabhata.