Question

Two identical heaters $220V$, $1000W$ are placed in series with each other across $220V$ lines. The combined power is

• A. $1000W$
• B. $2000W$
• C. $500W$
• D. $4000W$

Answer 1

Answer: (C)

$500W$

$P\propto V^2$
When the heaters are in series V is V/2
P is P/4 for each heater
$\frac{1000}{4}$ for each heater
$\Rightarrow 500Watt$ for 2 heaters