NEET Physics Alternating Current Questions Solved


A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate

    (i) the resistance of the bulb;

    (ii) the rms current through the bulb.

(i) P=V2R                                                                    (1/2) marks

100=(220)2RR=220×220100=484 Ω                          (1/2) marks

(ii) irms=VrmsR or PVrms                                                 (1/2) marks

220484 or 100220=0.45 A                                                (1/2) marks


Difficulty Level:

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