Physics

1Two capacitors of 3 μF and 6 μF are in series. Their combined capacitance is

2Two point charges are moved twice as far apart. The force between them becomes

3A lightning conductor protects buildings by

4The unit of capacitance is the

5A capacitor of 5 μF is charged to 10 V. The charge stored is

6A lightning conductor protects a building by

7A parallel-plate capacitor's capacitance increases when

8Capacitors of 2 μF and 3 μF are connected in parallel. What is the total capacitance?

9Charges on a conductor concentrate at

10The force between two charges 0.1 m apart is 9 N. If the separation becomes 0.3 m, the force becomes