Question

name the types of energy gained in the following situations
A) water stored in a dam.
B) rotation of blads of a windmill.

An electrical bulb of 100w is used for 8 hours per day calculate the unit of energy consumed in a month of 30 days

Answer 1

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Ans(a) Hydro power energy gained in this process.

Ans(b) Wind energy stored in this process.

Ans (c) Energy consumed by bulb in one day = 8 ×100W = 800 WH

And, we know, 1 KWH=1000 WH = 1 unit

So, 800 WH = 0.8 unit.

Energy consumed in 30days =

0.8 × 30 = 24 WH.

Hope this answer may help you!!

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Answer 2

(a) Potential energy

(b) Kinetic energy

power=100w

t=8*30=240h

energy=power*time

=100*240

=24000wh

=24kwh