electricity
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08/04/2023Electricity -by Molly Rathore 1
ELECTRICITY
MOLLY RATHORE X- ALPS
SUBJECT : PHYSICSCHAPTER : ELECTRICITY
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What is electricity???
Electricity is the set of physical phenomena associated with the presence and flow of electric charges.
Electricity -by Molly Rathore
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ELECTRIC CHARGESTypes of charges :1. Positive Charges2. Negative ChargesProperties of charges :3. Unlike charges attract each
other.4. Like charges repel each other.5. Electric charges are additive in
nature.6. Electric charges are quantized.
Electricity -by Molly Rathore
Q = ne , Q=charge transferred n=No. of electrons e=charge on electron
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ELECTRIC CURRENT
If the electric charge flows through a conductor, we say that there is an electric current in the conductor.
Electric current is expressed as the amount of charge flowing through a particular area in unit time. In other words, it is the rate of flow of charges.
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If a net charge Q, flows across any cross section of a conductor in time t, then the current I, through the cross section is
I = Q/tThe S.I. unit of electric charge is coulomb , which is equivalent to the charge contained in 6.25 X 1018 electrons.An electron possesses a negative charge of 1.6 X 10-19 C.
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Conventionally, in an electric circuit the direction of electric current Is take as opposite to the direction of the flow of electrons, which are negative charges.
Electricity -by Molly Rathore
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ELECTRIC CIRCUIT O A continuous and closed path of an
electric current is called electric circuit.
O If the circuit is broken anywhere, the current stops flowing.
CLOSED CIRCUIT DIAGRAM
OPEN CIRCUIT DIAGRAM
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