An electric filament bulb can be worked from Options: A . &nbspD.C. supply only B . &nbspA.C. supply only C . &nbspBattery supply only D . &nbspAll above

An electric filament bulb can be worked from

Question

An electric filament bulb can be worked from

Options:

A . D.C. supply only

B . A.C. supply only

C . Battery supply only

D . All above

Answer: Option D

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