Answer:
Power of the bulb is 10 Watts.
Explanation:
We have,
Power and voltage of electric bulb is 40 W and 200 V. Using this data we can find the resistance of the bulb.
Power, [tex]P=\dfrac{V^2}{R}[/tex]
R is resistance
[tex]R=\dfrac{V^2}{P}\\\\R=\dfrac{(200)^2}{40}\\\\R=1000\ \Omega[/tex]
The supplied voltage is 100 V.
Now power is given by :
[tex]P=\dfrac{V^2}{R}\\\\P=\dfrac{100^2}{1000}\\\\P=10\ W[/tex]
So, now the power of the bulb is 10 Watts.
