electric circuit电路.ppt

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2016-09-10 发布于河南
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electric circuit电路.ppt

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electric circuit电路

Current, voltage and resistor Glossary Electric circuit Electric charge Electrification by friction Two kinds of electric charges Glass rod rubbed with silk Rubber rod rubbed with fur Electric charge of the same kind repulse each other, and electric charges of the opposite kinds attract each other Electroscope Quantity of electric charge, Q; unit: C neutralization Conservation of electric charge Electrification by friction does not create any electric charge, but separate some of positive charges from negative charges by transferring them from one object to another Conductor and insulator Free electron Easy not easy Series circuit and parallel circuit Series circuit 串联电路 Parallel circuit 并联电路 Electric current Electric current is defined as the quantity of charges passing through a cross section of a conductor in 1 s. Ohm’s Law I: the electric current; Q: the quantity of charges passing across a conductor’s cross section; t: the electrified time. PRACTICE P4 P5 P6 P95 P101 P115