its just to make you understand what actually you need to do in a case study..

2. Electrical devices

3. Electrical devices are
defined as devices that use
or generates electricity and
transform it into another
form of energy such as
motion , heat or light.
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4. Electronic devices
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5. .
Electronic devices are components for
controlling the flow of currents for the purpose
of information processing and system control.
Prominent examples include transistors and
diodes. Electronic devices are usually small and
can be grouped together into packages called
integrated circuits.
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6. .
Toaster
. ▪ The electric current flows through a series of thin filaments
connected together but spaced widely enough apart to toast the
whole bread surface. ▪ The filaments are so thin that they glow red
hot when the electricity flows through them.
▪ Like a series of small radiators, the filaments beam heat toward the
bread in the toaster. ▪ The steady supply of heat rapidly cooks the
bread. There are filaments on each wall of the toaster so the two
sides of the bread cook at the same time.

8. Washing Machine
• 1) Water inlet control valve: Near the water inlet point of
the washing there is water inlet control valve. When you
load the clothes in washing machine, this valve gets
opened automatically and it closes automatically
depending on the total quantity of the water required. The
water control valve is actually the solenoid valve.
• 2) Water pump: The water pump circulates water through
the washing machine. It works in two directions, re-
circulating the water during wash cycle and draining the
water during the spin cycle.
• 3) Tub: There are two types of tubs in the washing washing
machine: inner and outer. The clothes are loaded in the
inner tub, where the clothes are washed, rinsed and dried.
The inner tub has small holes for draining the water. The
external tub covers theinner tub and supports it during
various cycles of clothes washing.
• 4) Agitator or rotating disc: The agitator is located inside
the tub of the washing machine. It is the important part of
the washing machine that actually performs the cleaning
operation of the clothes. During the wash cycle the
agitator rotates continuously and produces strong rotating
currents within the water due to which the clothes also
rotate inside the tub. The rotation of the clothes within
water containing the detergent enables the removal of the
dirt particles from the fabric of the clothes. Thus the
agitator produces most important function of rubbing the
clothes with each other as well as with water.
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9. Ceiling fan
• The electric motor is the electric
machine within the ceiling fan that
converts electrical energy into
mechanical energy. The ceiling fan
capacitor torques up the electric motor,
allowing it to start and run. An electrical
current reaches the motor and then
enters coils of wire that are wrapped
around a metal base. As this current
passes through the wire, a magnetic
field is caused that expends force in a
clockwise motion that actually changes
the electric energy into mechanical
energy. This action causes the motor
coils to spin. As the coils are spinning,
the fan captures this spinning motion,
transferring it to the fan blades.
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10. .