1.

Two electric bulbs A and B are marked 60 W, 220 V and 40 W, 220 V respecti0 Which one out of the two las greater resistance?(i) Which one out of the two will glow brighter if these are connected in parallel to 220 V mains?in whichone out ofthe lwowill glow brighter if these are connect din series to thvelye same supply?

Answer»

putting formula P=VI 60=220×II=60÷220 NOW WE PUT V=I R FOR BOTH THE BULBS THEN THE 1ST ANSWER WILL COME(ii) 1ST WILL BLOW BRIGHT



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