Question

explain the following :

(i) the elements of electric heating devices such as bread-toasters and electric iron are made of an alloy rather than of a pure metal.

(ii) series arrangement is not used for domestic circuits.

(iii) copper and aluminium wires are usually employed for electricity transmission.

Answer 1

(i)Alloy are used rather than pure metal because these alloy of pure metals have tendency to be shaped ,bear the heat of the things. Also the pure metal cannot be used in these types of complex machines.

(ii) Because, in series connection when one thing gets fused the other also gets fused.

(iii) Because, they are good conductors of electricity.

Answer 2

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1) The conductors of electric heating devices such as bread toasters and electric irons are made of alloy because resistivity of an alloy is more than that of metals. It produces large amount of heat and do not burn easily.

2) series arrangement is not used in domestic circuits. Because

◾ There is voltage division in series circuits. Each component of a series circuit receives a small voltage for a large supply voltage. As a result, the amount of current decreases and the device becomes hot.

3)

◾ Copper and aluminium wires have low resistivity.

◾ They are good conductors of electricity. Hence, they are usually employed for electricity transmission.

I hope, this will help you

Thank you____❤

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