9. We all know that Tungsten, which has a Melting point of 3422 °C and boiling point of 5555 °C, had been used as filaments in bulbs and Fluorescent lamps since 1906, when the tungsten filament was introduced. the efficiency of the Tungsten filament increased when William D. Coolidge at
(GE) General Electric produced a ductile form of Tungsten, which was available as powder at that time. Today’s lamps use coiled-coils of the Tungsten filament. Which among the following is the benefit of using the coiled-coils?