Two equal resistances when connected in ...

Two equal resistances when connected in series to a battery ,consume electric power of 60 W .If these resitances are now connected in parealled combination to the same battery ,the electric power cansumed will be :

(a)240W

(b)120W

(d)60W

Text Solution

Verified by Experts

`P_0=1/R(V_2/2)^2 times 2 =V_0^2/(2R)`
`P=V_0^2/R times 2`, So `P/P_0=4`

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