1.

(i) An electric bulb is marked 100 W, 250 V. What information does this convey ? (ii) How much current will the bulb draw if connected to a 250 V supply ?

Answer»

(i) It means that if a bulb is given a 250 V supply, it will consume 100 J of energy per second.

(ii) Let P = VI ⇒ ∴ I = 0.4 A



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