Chapter 12 Electricity

Electrical resistivity of any given metallic wire depends upon?

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The electric current is a flow of electric charges, called electrons, in a conductor such as a metal wire.
Current is measured by an instrument called voltmeter.
It is the potential difference between the ends of the wire which makes the electric charge to flow in the wire.
When one coulomb of charge flows through any cross-section of a conductor in 1 second, the electric current flowing through it is said to be one ampere.

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In the series connection of electrical appliances, the overall resistance of the circuit increases too much due to which the current from the power supply is low.
In series circuit, if one electrical appliance stops working due to some defect, then all other appliances also stop working.
In series circuit, the appliances get the same voltage as that of the power supply line.
In series circuit, all the electrical appliances have only one switch due to which they cannot be turned on or off separately.

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