Question

write the main causes of charges

Answer 1

charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges; positive and negative. Like charges repel and unlike attract.

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Answer 2

Causes

1) Contact-induced charge separation. Styrofoam peanuts clinging to a cat's fur due to static electricity.
2) Pressure-induced charge separation. Mainarticle: Piezoelectric effect.
3) Heat-induced charge separation. Main article: Pyroelectric effect. ...
4) Charge-induced charge separation. Mainarticle: Electrostatic induction.