-S.Dileep Kumar
-A.Tejitha reddy
What is Witricity?
 Transfer of electricity without using connections between
input and load is termed as wireless electricity.
 This is not like wireless transmission of signals which we
used in the cell phones.
 In cell phones signals are sent in the form of micro waves
whereas in this mode of transition electricity is transferred in
the form of magnetic rays.
These rays are not harmful to humans.
 The transfer of energy is mid range compared to direct
Need of Witricity
 Now-a-days there is a rapid increase of electronic goods like cell
phones ,laptops ,I-pods etc., which rely on the chemical storage of
energy by the battery which need to be recharged frequently .As
these are becoming daily needs to the present generation wireless
energy transfer i.e, witricity would be useful for many applications as
these things need mid range energy.
Working principle of Witricity
Witricity works on the principle of mutual induction between the two
There are two copper coils arranged one at the sender end and other at
the receiver end .The first coil is attached to the power source while the
second coil to the light bulb.
When the power is switched on the first coil converts the electricity into
magnetic field ,which is oscillating at a particular frequency i.e, AC source.
The second coil at the receiver end converts the magnetic field into
electricity .The surrounding environment is unaffected.
Projecting magnetic field
Magnetic vector notation
Induced EMF due to change in flux
 An advantage is that we can produce electricity anywhere without wires
 The power can be delivered in any direction i.e, omnidirectional
 Most common things in our surroundings do not interact with these
magnetic fields and thus not harmful to other living beings
 Significant decluttering of office space
 No need for meter rooms and electrical closets.
 Reduction of e-waste by eliminating the need for power cords
 Need more light in your office, no need for electrician. Simply place the
lamp where ever you need it.
The flux condition should satisfy certain conditions,if not no power
supply takes place.
There is a lose of power transmission if there is a strong ferro-magnetic
 Need for standardization and adaptation. So no overheating occurs
because of different voltages.
 Retrofitting old equipment or purchasing new equipment could
become a very expensive endeavor.
 Possibility of “energy theft”. Wi Fi, someone can be using your internet
or your power.
 Any living organisms that are placed in between the two
coils(transmitter &emitter) will not halt or hinder the transmission of
magnetic field.
 It is because the magnetic rays will not interact with the living tissues so
strong and can be easily passed through the humans or other living
World in our
Thank you

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