#### Term 2 - Electric Charge and Electric Current Two Marks Questions

9th Standard

Reg.No. :
•
•
•
•
•
•

Science

Time : 00:45:00 Hrs
Total Marks : 20
10 x 2 = 20
1. On what factors does the electrostatic force between two charges depend?

2. What are electric lines of force?

3. Define electric field.

4. Define electric current and give its unit.

5. A bird sitting on a high power electric line is still safe. How?

6. Two resistors 12$\Omega$ and 6$\Omega$ are first connected in series and then in parallel. The current-voltage graph for the two connections will be represented by which lines in the graph?

7. Does a solar cell always maintain the potential across its terminals constant? Discuss.

8. What is the effective resistance across the terminals a and b of the arrangement of resistors?

9. Can electroplating be possible with alternating current?

10. Rubbing a comb on hair makes the comb get – 0.4C.
(a) Find which material has lost electron and which one gained it.
(b) Find how many electrons are transferred in this process.