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Q.

Is it true that the conductors of electric heating devices, such as bread-toasters and electric irons, are made of an alloy rather than a pure metal?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
The low-resistance metallic wire used to make the conductor for electric heating appliances is either copper or aluminium.
In comparison, the heating element is constructed of an alloy with more resistance than the individual metals that make it up. It is well known that the heat generated by a current (H) is directly proportional to the amount of resistance (R,), meaning that the heating element generates more heat since it has more resistance and glows.
 
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