1. Three charged balls, P, Q and R are suspended by insulating threads. Ball P is negatively charged.

Ball Q is brought close to ball P.


Ball Q is now brought close to ball R.




2. Which of the following statements about an electrical insulator is correct?


3. Two suspended light, aluminium coated with balls have been touched by the same charged perspex rod. They will;


4. A charged rod may be discharged by holding it just above a flame. This is because…..


5. A negatively charged strip is brought near to (but not touching) an uncharged conductor. If  the conductor is earthed it


6. Four processes are used to charge an isolated metal sphere.

P: The sphere is earthed by touching it

Q: The earth connection is removed from the sphere

R: A charged rod is brought close to the sphere

S: The charged rod is removed

In which order should these processes be carried out to charge the sphere?


7. A plastic rod is rubbed with a cloth. At the end of the process, the rod is found to be positively charged and the cloth is found to be uncharged. This involves the movement of


8. Two isolated spheres X and Y of unknown materials are touching one another as shown below.


Sphere Y is negatively charged and sphere X is earthed. The earth connection is removed from sphere X and then the spheres are separated as shown below.


Sphere X is found to be positively charged and sphere Y remains negatively charged.

Which of the following describes the nature of the materials from which the spheres are made?

Sphere X Sphere Y
A. Insulator Insulator
B. Insulator Conductor
C. Conductor Insulator
D. Conductor Conductor




9. The diagram below shows a positively charged rod brought near an isolated uncharged metal plate.


As a result of bringing the rod near to the plate,


10. The diagram below shows a charged rod R suspended by insulating strings. When a stationary rod S is placed nearby, rod R is attracted towards it.


Consider the following statements regarding the possible nature of the rod S.

I. Rod S is charged

II. Rod S is an uncharged insulator.

III. Rod S is an uncharged conductor.

Which statement(s) can explain the attraction of rod R to rod S?


Question 1 of 10