Learn Class 8 Science - Some Natural Phenomena

What is Natural Phenomena? In general terms, the natural phenomenon is something that happens by itself. Like it does not need any human interference.

Meaning

• It means any natural calamity that occurs itself.
• LIKE: Earthquakes and lightning.

Charged objects

• Such objects get set by rubbing.

Electrostatic force

• It is considered as the attraction & repulsion force.
• And which also includes the charged objects.

Static Electric Charge

• The charge that does not move.
• It occurs when two substances come in contact with each other.
• It depends on two factors, i.e., temperature & humidity.

How do charges get transferred?

Many ways can help to transfer the charges. Such methods are below:

1. Induction:

• The process results in shifting the electron's position.
• There is no involvement of physical contact between the objects.

2. Conduction:

• The transfer of changes happens with the help of a conductor.
• It occurs when the two objects come in contact.

Electroscope:

• The concept was given by 'Abraham Bennet' in 1787.
• The device helps to know whether the object is charged or not.

Structure:

• The glass jar comes in a vertical brass rod.
• Rod gets inserted into the jar with the help of cork.
• Brass rods consist of the brass disc.