(a)[1]
State the meaning of power.
(b(i))[2]
Calculate the current through the filament lamp.
(b(ii))[1]
Calculate the filament resistance.
(c)[2]
State and explain how using thinner wire in the filament changes the power input to the lamp.
Physics 5054 · O Level · Electrical quantities
Electrical quantities — practice question
When a filament lamp is connected to a $12\,\text{V}$ supply, its power input is $20\,\text{W}$.
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