Wireless electricity enables the transmission of electrical energy without wires, using principles of resonance and magnetic induction. Pioneered by Nikola Tesla in 1899, modern advancements like MIT's Project Witricity have shown practical applications in charging electronic devices wirelessly. Despite its advantages such as eliminating the need for power cables, it faces challenges including design limitations and efficiency over distance.

1. Wireless Electricity
Presented By:
Obaid ur Rehman
Reg No:
BSP01183010

2. Contents:
 Introduction of Wireless Electricity
 History of wireless Electricity
 How it work?
 Modern research over the past years
 Application and challenges of witricity
 Advantages and Disadvantages
 Conclusion
 References

3. Introduction of Wireless Electricity;
 Transmission of electrical energy from power source to an electrical
load without using wires.
 Different from cellular transmission of signals.
Transmitter
Receiver

4. History of Wireless Electricity:
In 1899, Sir Nikola
Tesla performed the
first experiment on
Wireless Electricity.
He had put a great
effort in popularizing
the idea.

5. How it works ?
Wireless electricity uses the same principle as Magnetic
induction , but uses resonance to increase the range.
We know that Everything resonates at a certain frequency,
based on its shape and material.
Energy transfers easily between resonating objects.
With resonant induction, power is transmitted between two
resonating coils.

6. Modern research over the past years:
 Project Witricity:
 In 2007, a group of engineers at MIT (Massachusetts Institute of Technology) came up
with the idea of to use resonant induction to transmit power wirelessly.
 Engineers powered 60 watt bulb from 2 meters (7ft) at efficiency 45%.
 First practical example of WiTricity.

7. Challenges and Application
of Witricity:
 Witricity is an American engineering company.
 Manufactures devices for wireless energy transmission using
resonant energy transfer based on oscillating magnetic fields.
Challenges:
Design of high frequency stable oscillators.
Reducing the size of the coils used.
Cost of production.

8. Application:
 Electronic gadgets like laptops, mobiles,
iPod etc. can be charged wirelessly.
 Charging is automatic, without human
interception.
 The hybrid car can be charged
automatically.
 The entire lighting system can be powered
wirelessly

9. Wireless Electricity:
 No need of power cables and
batteries.
 Magnetic fields interact
weakly with biological
masses.
 No need of line of sight.
 Transmissions possible only in
few meters.
 There are possibility of
“Energy theft”.
 Efficiency decreases with
distance
Advantages: Disadvantages:

10. Conclusion:
 From an environmental standpoint , this technology could replace
disposable batteries and cords, reducing dangerous chemicals and
potential for poisoning communities.

11. Reference:
 https://sites.google.com/a/uw.edu/ethical-implications-of-wireless-power
 https://en.wikipedia.org/wiki/Electromagnetic_induction
 https://en.wikipedia.org/wiki/Electromagnetic_induction