ppt for electricity

1. Charged interactions

2. Objectives
After performing this activity, you should be
able to:
1. charge a material by friction;
2. observe the behavior of charged objects;
3. distinguish between the two types of
charges; and
4. demonstrate how objects can be
discharged

3. •Materials Needed:
• Strong adhesive tape (transparent)
• Smooth wooden table
• Meter stick/ ruler
• Piece of wood (~1 meter long) to hold tape
strips
• Moistened sponge

4. Procedure:
1. Using a ruler, pull off a 25- to
30- cm piece of adhesive tape and
fold a short section of it (~1 cm)
to make a nonsticky "handle" at
that end of the tape.

5. 2. Lay the tape adhesive
side down and slide your
finger along the tape to
firmly attach it to a smooth,
dry surface of a piece of
wood.

6. 3. Peel the tape from the
surface vigorously pulling up
on the handle you have made
on one end. See figure below.
Make sure that the tape does
not curl up around itself or
your fingers.

7. How to peel the tape off the surface

8. 4. While holding the tape up by the
handle and away from other objects,
attach the tape to the horizontal
wooden piece or the edge of your
chair. Make sure that the sticky side
does not come in contact with other
objects.

9. Attaching the tape to the edge of the chair

10. 5. Bring your finger near, but not
touching, the nonsticky side of
the tape.
•Is there any sign of interaction
between the tape and the
finger?

11. 6. Try this with another
object. Is there any sign of
interaction between
the tape and this object?

12. 7.Prepare another tape as described
in steps 1 to 3.
8. Bring the nonsticky side of the
two charged tapes you prepared
near each other. Do you observe any
interaction?

13. 9. Drag a moistened sponge
across the nonsticky side of
the tapes and
repeat steps 5, 6 and 8.
Do you still observe any
interaction?

14. 10. Record your
observations and answer
the guide questions in a
manila paper or in a
powerpoint presentation.