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Q. If two identical heaters each rated as (1000 W, 220 V) are connected in parallel to 220 V, then the total power consumed is

BVP MedicalBVP Medical 2012

Solution:

When a single heater (resistance $ {{R}_{1}}=R $ ) s connected to 220V, then it will consume a power $ {{P}_{1}}=1000 $ W, if two such identical heaters are connected in parallel (total resistance $ {{R}_{2}}={{R}_{1}}/2=R/2 $ ) to same source, then it will consume power $ {{P}_{2}} $ $ \frac{{{P}_{2}}}{{{P}_{1}}}=\frac{{{R}_{1}}}{{{R}_{2}}} $ $ {{P}_{2}}=2{{P}_{1}}=2000W $