Physics notes class 7 electricity
PHYSICS NOTES Electricity Important points * Electricity -The flow of charges or electrons is called electric current. Such phenomena is called electricity. *It is of two types : ( 1) Static electricity = The electricity which is generated by rubbing is called Static electricity. * Current electricity : The electricity in which there is continuous flow of charges is called current electricity. * Voltage : it is also known as potential difference. The work is done to carry one unit of positive charge from one point to another point in an electrical field. NOTE :It is measured in unit volt . *Electric circuit : The closed conducting path along which electric current flows is called electric circuit. * IT HAS 4 COMPONENTS: (1) A source of electric current Example : cell or battery (2) A conducting wire ...