Question

If an electric iron of 200watt is used for30 minutes everyday find electric energy consumed in maonth of april

Answer 1

Answer:

Energy consumed in month of April is 10800000 joules or 3 units.

Explanation:

Given

P = 200 watt

t = 30 minutes

1 minute = 60 seconds

30 minutes = 30 × 60 seconds

Then,

t = 30 × 60 = 1800 seconds

P = E/t

E = Pt

E = 200 × 1800 watt sec

E = 360000 watt sec or Joule.

Here,

P is the power consumed.

E is the energy consumed.

t is time.

Energy consumed in 1 day = 360000 joules

April has 30 days.

Energy consumed in 30 days = 360000 × 30 joules

Energy consumed in 30 days = 10800000 joules

To change into kwhr we can divide it by 3600000

Energy consumed in kwhr = 10800000/3600000 kwhr

Energy consumed in kwhr = 3 kwhr

1 kwhr = 1 unit

3 kwhr = 3 units

Energy consumed in month of April is 10800000 joules or 3 units.