Question

If two bulbs rated at $600W,200V$ are put in series in a $110V$ line then what is power generated by each bulb?

• A. $22.5W$
• B. $37.5W$
• C. $40.0W$
• D. $45.0$

Answer 1

The correct option is B $37.5W$

In series voltage across each bulb
$V_A=\frac{R}{R+R}V$

$=\frac{V}{2}$

$=\frac{110}{2}=55V$
Power consumed by each bulb
$P^{\ast }=\frac{V_A^2}{R}$

$=\frac{V_A^2}{V_r^2}P=\frac{55\times 55}{220\times 220}\times 600$

$=37.5W$