Components of the main-box are a fuse box and a .

A house has $3$ tube lights, $2$ fans and a television. Each tube lights draws $40 \mathrm{W}$. The fan draws $80 \mathrm{W}$ and the television $60 \mathrm{W}$. On an average, all the tubelights are kept on for five hours, two fans for $12$ hours each and the television for five hours a day. Find the cost of electric energy used in $30$ days at the rate of Rs $3.00$ per $\mathrm{KWH}$.

What is meant by electrical power? The rating of a bulb is written as $220 \mathrm{V}-100 \mathrm{W}$. What is its meaning?

An electric bulb is connected to a $240 \mathrm{V}$ generator. The current is $0.65 \mathrm{A}$. What is the power of the bulb?

Write the SI unit of electric power.

What is the Power of a refrigerator, which is connected to a $220 \mathrm{V}$ generator? The current is $1.25 \mathrm{A}$.

Soham uses a $600 \mathrm{W}$ Music System for $5$ hours daily. Calculate the electrical energy consumed in $\mathrm{kWH}$ for $30$ days.