A heater coil is cut into two parts of equal length and only of them is used in the heater. the ratio of heater produced by this half coil to that by the original coil is? A. 2:1 B. 1:2 C. 1:4 D. 4:1
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option A is right option
Anonymous:
please explain
can you solve this? two electric bulbs have filaments of same length if one of them 50w bulbs and other 100w then? A. 100w bulb has thicker filament B. 50w bulb has thinner filament C. both filaments are of same thickness D. the thickness of filaments can not be compared.
but the answer is B
higher the power lesser the thickness what do u mean then?
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