Answer to Question #235492 in Electric Circuits for Ahmad

Question

10 fluorescent bulbs rated 36W each, and 50 LED lights rated 7W each are continuously tested for 24 hours straight. Determine the kWh consumption of the overall test

Answer 1

Gives

Number of bulbs=10

Number of LED=50

$P_1=36W\\P_2=7W\\t=24hr$

$P_1=\frac{E_1}{t}\\E_1=P_1\times t_1$

$E_1=36\times24=864Wh$

$E_2=P_2\times t_2=7\times 24=168Wh$

Now n=10 bulb

$P_1=\frac{E_1}{t}\\E_1=n\times P_1\times t_1$

$E_1=10\times36\times24=8640Wh=8.64KWh$

Now n=50 LED

$E_2=n\times P_2\times t_2=50\times7\times24=8400Wh=8.4KWh$

Overall energy test=8.64+8.4=17.04KWh

E=17.04KWh