Question

A bulb of power 40 w is used for 12.5 h each day for 30 days.Calculate the electrical energy consumed.

Answer 1

Answer :-

E = 15 kwh

Given :-

p = 40 w

= 40/1000

= 0.04 Kw

t = 12.5 h

Number of days = 30

To find :-

The electrical energy consumed.

Solution:-

The electrical energy consumed by bulb is given by :-

$\huge \boxed{E = p t n}$

where p is power ,t is time and n is number of days.

Put the given values,

→$E = \dfrac{4}{100} \times 12.5 \times \30$

→$E = \dfrac{4}{100}\times 375$

→$E = \dfrac{1500}{100}$

→$E = 15 kwh$

hence,

The electrical energy consumed by bulb is 15 kwh.