Is a short and clean presentation power point slide for both both Engineering and Physics students and teachers.

2. Electromagnetic Induction
Created electromotive force from interaction
with magnetic field

3. Magnet Induces Current
Voltage is induced when a magnet moves towards or away
from a coil, inducing a current in the coil.
Faster the magnet’s motion, the greater the induced
current.

4. Faraday’s Law
Small
Voltage
Large
Voltage

5. Electric generator moves a conductor in a magnetic field
to produce voltage via electromagnetic induction
Electric Generator
Mechanical energy
Electrical energy

6. Electric Motor
Current inCurrent in
Can create an electrical motor by
passing a current through a set of
electro-magnets mounted on a
rotating shaft.
Electrical energy
Mechanical energy

7. Induction: No Free Lunch
Takes work to turn the generator crank to produce electric current.
The faster we turn the crank to produce more current, the more difficult it
is to turn
More difficult to push the
magnet into a coil with more
loops because the magnetic field
of each current loop resists the
motion of the magnet.

8. Electromagnetic Oscillations
.
Oscillating
Magnetic
Field
Connect to
alternating
current (AC)
Coil with bulb

9. Magnetic Recording
Write data by magnetizing recording media (e.g., video
tape, hard disk) using electromagnets.
Data is read back using the induced current produced
when magnetized media moves past receiver coils (reverse
of writing data).
Hard disk

10. Demo: Magnetic Brakes
Strong magnet dropped into a copper pipe falls slowly
due to secondary magnetic field induced by its motion.
Great America’s Drop Zone
has a 22 story freefall,
lasting four seconds,
decelerated by magnetic
braking.

11. Metal Detectors

12. Eddy Currents
Primary Magnetic Field
Self-Induced
Magnetic Field

13. Presented by :
 Md. Shahriyar Hassan ID:171-33-3867
 Tirtha Bose ID:171-33-3912
 Md. Mehedi Hasan ID:171-33-3809
 Shahadat Hossain ID:171-33-3893
 Arshed Hossain Fahim ID:171-33-3852

14. THANK YOU