In which device heat produced is not desirable?

1.	In which device heat produced is not desirable?
Answer» $\huge{ \pmb{ \frak{ \underline{ \color{blue}{❥Answer}}}}}$ $\implies$ An ELECTRIC bulb is used for LIGHT but it ALSO gives heat. This is not desirable. This results in the WASTAGE of electricity.

Answer»

$\huge{ \pmb{ \frak{ \underline{ \color{blue}{❥Answer}}}}}$

$\implies$ An ELECTRIC bulb is used for LIGHT but it ALSO gives heat. This is not desirable. This results in the WASTAGE of electricity.

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