Question

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

• A. 200 W
• B. 2500 W
• C. 250 W
• D. 2000 W

Answer 1

Answer: (D)

When a single heater (resistance $R_1=R$ ) is connected to $220V$, then it will consume a power $P_1=1000W$, 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 $P_2$
$\frac{P_2}{P_1}=\frac{R_1}{R_2}$
$P_2=2P_1$
$=2000W$