PH-1874

Electrical power and energy

Physics · Secondary 4 · Medium · Electrical power and energy

A 60 W lamp is connected to a 240 V mains supply. Assuming it is designed for this voltage, what is the resistance of the filament when operating normally? Use

P = V^2/R

$960\,\Omega$
$3.8\,\Omega$
$120\,\Omega$
$14{,}400\,\Omega$

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