Page 11 - Final Science_B.B_prep.1_t.1_unit2 2026_Neat

Properties of Electric Force Lines:
1- Imaginary lines that do not intersect each other.
2- They start from the positive charge and end at the negative charge.
3- They end at the surfaces of charged metal objects & do not penetrate
them.

Electroscope device:

1- Used to detect the electric state of the object.
2- Used to determine the type of the charge on a charged object.
3- Comparing the magnitude of charges on different charged objects

Composition:
Copper disc – Glass container
Copper rod - Two gold leaves

Procedures:

to detect the electric state of the object:

(1) Touch the metal disc of the electroscope with your hand
to ensure it is not charged by any electric charge.

(2) Bring the object to be tasted close to the electroscope disc until it
touches it.

First Term 110