Notesale: Turn your study into money

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7
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1
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Unit:- Ohm
2
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Unit:- Henry(H)
Practical unit milli henry(mH)
Advantage:• there is no loss of energy

Limitation:-

3
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Unit:- farad(F)
Other units are micro farad, nano farad,
pico farad
Capacitors in which paper is used in between the
plates is paper capacitors
...

Germanium and silicon are main semiconductors
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[First electronic computer]
Diode, Transister and IC Chip are made use
semiconductor
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Diode

To convert AC to DC
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Here the diode’s positive is connected
with cells positive
...

• Reverse Biasing:- The current does’nt
flow if p region is connected to
negative terminal of the cell and n
region connected to positive terminal
...
So the current does not
flow through the circuit
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LED(Light Emitting Diode)
Some diode emitt light,they are LED
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Advantage:•
•
•
•
•
•

Low enegy consumption
Small in size
Long lasting
Low cost
Light of various colours
Unaffected by temperature variation

•
•
•
•
•
•

Head lamps of vehicles
Trial lamp
Light show
Traffic signals
Display boards
Street light

Uses:-

Rectification
It is the process of converting AC to DC using
diode’s
...
Half wave rectification
Using one diode we get half wave of DC output
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Full wave rectification
Using two diode's we get full waves of DC output
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Transister

Increase the strength of electrical signals
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Amplification
Amplification Amplificais the process of
strengthening electric current
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IC Chip(Integrated circuit)

It is an arrangement incoporating the functions of
a lot of transistors, diodes, resistors, capacitors,
etc
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Importance:• Ability to minimize the size of
electronic electrondevices since the
function of crores of transistors and
other components are incoporated in a
chip
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Telecommunications
• Internet
• Television
• Mobile phone
• Radio
2
...

• They are the particles of light
• Laser optics, fibre optics,etc
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Wifi(Wireless Fidelity)
• This is the method in which data is
transferred using radio waves link
without connecting with wires
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• Using single WiFi modem,more
computers can be linked to Internet
without wire connection
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4
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This is done by image
sensor in camera
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• No of pixels that decides the clarity of
the pictures(2mp, 5mp)
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5
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• HD transmission depending on the
maximum no of pixels in each frame
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6
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7

• 1nm=10-9m
• One nanometer is the length can be
obtained when 3 atoms led side by
side
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• For example opaque object will change
into transparant object(Copper), Non
inflammable substances undergo
combustion(aluminium), Substances
without soluble can become
soluble(gold)
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Highly efficient batteties
...
,
Display screens which are lighter
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Long lasting tennis ball
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Robotics
• Robotics are machines that perform
their tasks by themselves or by remote
control
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Different fields using robots:a
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Mobile robots
• Move on tracks or move using legs ore
wheels
c
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Domestic robots
• Modern domestic chores
• Modern toys
e
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In the field of defence

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