Circuit Theory

A $100\;W$ bulb, a $40\;W$ fluorescent lamp and a $60\;W$ fan in a room operates for an average duration of $5$ hours in a day. What will be the total energy consumed during the month of April $2016$?

a) $3\;kWh$

b) $30\;kWh$

c) $300\;kWh$

d) $3000 \;kWh$

Correct Answer: Option B

Solution:

Total power = $100+40+60\;W$ $=200\;W$

Since Energy = Power $×$ time period

Power = $200\;W$

Time period = $5$ hours in $30$ days (April $2016$)

$$E=200×5×30\;Wh$$ $$E=30,000\;Wh$$ $$E=30\;kWh$$