1. Two electrical bulbs marked 40 W, 220 V and 60 W, 220V when connected in series across same voltage supply of 220 V, the effective power is P and when connected in parallel, the effective power is P2. Then (P/P) is :- (1) 0.5 (3) 0.24 (2) 0.48 (4) 0.16 2. If the equivalent resistance between the points X and Y in the given circuit is Ro, then the value of R, will be: XO www R www R Ro 3. R (1) Ro YO-WW (3) Ro/3 (2) Ro/2 (4) Ro/3 If the potential drop across the 42 resistor is 4 V then find V. 60 292 ww 352 ww 8 452 ww (1) 12 V (2) 24 V (3) 18 V (4) 16 V