Wireless electricity, also known as WiTricity, was first proposed in 1899 by Nikola Tesla. In 2007, a group of MIT scientists led by Marin Soljacic revived the concept and developed an efficient wireless power system. WiTricity works by using magnetic resonance to transmit electric current from a transmitting coil to a receiving coil within a few meters without wires. While it provides advantages like eliminating wires and batteries, challenges remain in improving efficiency and increasing the range of wireless power transmission.

2. ELECTRICITY WITHOUT WIRES IS CALLED
AS WITRICITY.
WHAT IS WITRICITY ?

3. HISTORY OF WITRICITY
 In 1899, Sir Nikola Tesla proposed a method
of wireless power transmission .
 As it is in Radiative Mode, most of the
power was wasted and has less efficiency.
 So he proposed wireless power transmission.

4. SIR NIKOLAS TESLA

5. WITRICITY LOGO

6. FORGOTTEN INVENTION WAS
REBORN IN 2007
A Group of MIT scientists came up with
the idea of wireless transmission and the
group was led by Marin Soljacic and they
named it as “WITRICITY”.

7. MIT SCIENTISTS

8. EFFECIENCY CHART OF WITRICITY

9. HOW WIRELESS POWER WORKS ?
 Magnetic coil (Antenna A) is housed in a box and can be
set in the wall or in the ceiling .
 Antenna A powered by mains, resonates at a specific
frequency.
 Electromagnetic waves transmitted through air.
 Second Magnetic Coil (Antenna B) fitted in laptop or
T.V. or other devices at same frequency as 1st and absorbs
energy.
 Energy charges the device.

10. HOW WIRELESS POWER WORKS ?

11. WHY WE NEED ?
 WE HUMANS LOVE ELECTRICITY !!!!!!!
 AND TO POWER OUR DEVICES WE USE THEM.
 PER YEAR THERE ARE 40MILLION DISPOSAL
BATTERRIES!!

12. WHICH ENDS AS

13. WIRES ARE BURDEN FOR US…..

14. WE HUMANS LOVE WIRES!!!

15. BUT IT MAY END US SOMETIMES!!!!!!

16. ADVANTAGES OF WITRICITY
 Safe, fairly efficient, good range.
 Getting rid of great deal cables.
 More secure, No risk of getting shock.
 No usage of wires.
 Range can be increased.
 Need for batteries are eliminated.
 Maintenance cost will be saved.

17. DISADVANTAGES
 Wireless Power Transmission is only possible for few
meters.
 Little over heating occurs because of different voltages.
 Efficiency is only about 40%.
 Possibility of “Energy Theft”.
 Refitting old equipment or purchasing new equipment
could become very expensive .

18. RANGE OF WITRICITY
 Witricity can perform electric transmission 2cm to 3-4
meters.
 Scientists are working to extend the range of electric
transmission.

20. FUTURE OF WITRICITY

21. WITRICITY VIDEO

22. WITRICITY MAKES PRODUCTS
More Convenient :
 No manual changing or recharging batteries
 Eliminate unsightly, unwieldy, costly power cords.
More reliable :
 Never run out of battery power.
 Reduce product failure rates by fixing the “ Weakest
Link”.

23. More Environmentally Friendly :
 Reduce use of lots and loops of wires.
 Reduce E-waste.

24. HOW SAFE IS WITRICITY
 Human Beings or other objects placed between the
transmitter and receiver do not hinder the transmission
of power.
 Magnetic fields tend to interact very weakly with the
biological tissues of the body and so are not prone to
cause any damage to any living being.

25. CONCLUSION
Think that the city will be covered with
Wireless Power Transmission Hotspots,
just like wireless internet, there will be
no need of charging batteries, or carrying
adapters all around.

26. Imagine your cell phones, laptops, tablets, I-pods
and other power hungry devices getting charged
on their own, eliminating the need of plugging.
AND THIS POSSIBLE DUE TO
WIRELESS ELECTRICITY
OR “WITRICITY”.....!!!!!

27. DONE BY
D. Harsha Vardhan
IX-B