Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
what is the filament in a light bulb made of | 1.92 | 0.6 | 4932 | 49 |
light bulb filament made of | 1.73 | 0.4 | 4163 | 43 |
who made the filament in the light bulb | 0.68 | 0.2 | 3086 | 44 |
filament in an electric light bulb made from | 0.88 | 0.1 | 7129 | 82 |