73 questions in Chapter 12 Electricity

Unit of electric power may also be expressed as?

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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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Nichrome alloy is used for making the heating elements of electrical appliances.
The heating elements of electrical heating appliances such as electric iron and toaster are made of an alloy rather than a pure metal.
Alloy of nickel, chromium, manganese and iron having a resistivity of about 60 times more than that of copper.
Nichrome undergoes oxidation very easily at a high temperature.

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