Electrical charges

All matter contains electric charges, which can be positive or negative.

Bodies charged with charges of the same type repel each other.

Bodies charged with charges of different types attract.

Complete the following sentences.

•  Electric charges can be _______________ or _______________.
•  When a body loses negative charges, it becomes ____________ charged.
• When a body gains negative charges, it becomes _______________ charged.
•  When a body contains the same number of positive and negative charges, it is electrically ________________.

• Observe and explain why the pen attracts the slips of paper.

• Look at the diagrams and explain what kind of forces are produced in each case.

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