Question

Q3) Write answer to the following questions. A) Write difference between: Work and energy Work Energy​

Answer 1

Answer:

The difference between work and energy

Energy is also referred to as the force which works at a certain distance.

...

Difference Between Work and Energy

Work Energy

Work = force X distance There are various equations depending upon the types of energy

The components of the force are parallel to the displacement Energy is the result of the work performed

Explanation:

hope it helpful

Answer 2

Answer:

Answer

for example

Electrical Energy

(i) The work done or energy supplied by the source in maintaining the flow of electric current is called electrical energy. It appears in the form of heat given by

H=VIt=

R

V

2

t

=I

2

RT

(ii) It is equal to the product of power and time

E=P×t

(iii) Its SI unit is joule (J)

Electric Power

(I) The time rate at which electric energy is consumed or dissipated by an electrical device is called electric power and is given by

P=VI=

R

V

2

=I

2

R

(ii) It equal to the rate of doing work by an energy source.

P=

t

W

(iii) Its SI unit is watt (W)

1 W=1 Js

−1

(b) For the same applied voltage ,

P=

R

V

2

P∝

R

1

less the the power of electrical device, higher is its electrical resistance.

So 40Watt lamp will have higher resistance

(c) Kilowatt hour – Commercial unit of electrical energy

1 kWh=1000 Wh=1000 J/S×3600 sec

=3600000 J=3.6×10

6

J