Which of the following metals is mostly used for filaments of electric bulbs?
ATungsten
BCopper
CNickel
DSilver
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The filament of a bulb is made extremely thin and long in order to achieve?
ഗാർഹികാവശ്യത്തിനായി വിതരണം ചെയ്യുന്ന വൈദ്യുതിയുടെ ആവൃത്തി എത്ര ?
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- (i) Soft iron core
- (ii) Coil
- (iii) Magnets
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