electromagnetic induction n s n voltmeter + - stationary
TRANSCRIPT
Electromagnetic Induction
N SN
Voltmeter
+-
Stationary
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet is moved towards Coil
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet moved towards Coil
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet moved towards Coil
An Emf is induced. - A voltage or potential difference is Induced.
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved towards Coil
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic field
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved towards Coil
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved towards Coil
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved towards Coil
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
Bulb lights
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved towards Coil
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
Bulb lights
A current is generated that Induces a magnetic field that opposes theincrease in magnetic field lines directed to west by the north pole of the bar magnet.
Electromagnetic Induction
N SN
Voltmeter
+-
Stationary
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet is away from Coil
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet moved towards Coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet
moved to the right
Electromagnetic Induction
N SN
Voltmeter
+-
Magnet moved away from coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet
moved east
An Emf is induced.
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from Coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic field
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east.
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from Coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east.
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east.
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east.
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
BulbLights
Electromagnetic Induction
N SN
Voltmeter
+-
Moved away from Coil
Induced magnetic field opposes the decrease in magnetic field lines directed to west by the north pole of the bar magnet moved east.
An Emf is induced.
A current is induced ina direction consistent with the induced magnetic Field.
Thumb -CurrentCurled Fingers-Magnetic Field
BulbLights
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Stationary
Emf is induced
.
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
The current that is induced creates a magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
The current that is induced creates a magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
The current that is induced creates a magnetic field which opposes decrease in magnetic field lines into the paper.
Decrease of field lines on left side of moving bar
+ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + + + ++ + + + + + + + + +
Voltmeter
+-
Moved to left
Induced magnetic field opposes decrease in magnetic field lines
Emf is induced
The current that is induced creates a magnetic field which opposes decrease in magnetic field lines into the paper.Bulb Lights
Decrease of field lines on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Stationary
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes increase in magnetic field lines into the paper.
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes increase in magnetic field lines into the paper.
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes increase in magnetic field lines into the paper.
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes increase in magnetic field lines into the paper.Bulb lights
increase of the field lines into the paper on left side of moving bar
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + +
Voltmeter
+-
Moved to right
Induced magnetic field opposes increase in magnetic field lines
Emf is induced
Current is induced that creates magnetic field which opposes increase in magnetic field lines into the paper.Bulb lights
increase of the field lines into the paper on left side of moving bar
• Stationary
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
• Pushed in
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
• Pushed in• Decrease in the number of field lines
Into the paper contained ine the loop+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
• Induced current is clockwise
+ + + + + + + + + + + + + +
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• Induced current is clockwise• Induced current magnetic field opposes
decrease in the field lines into the paper+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + ++ + + + + + + + + + + + + +
• Wire loop stretched out
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+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
• Wire loop stretched out• There is an increase in the field lines into the paper
inside the loop
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
• Wire loop stretched out• There is an increase in the field lines into the paper
inside the loop
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
Wire loops
• Induced current produces magnetic field lines that oppose the increase in the number of field lines ino the paper
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
Wire loops
• Induced current produces magnetic field lines that oppose the increase in the number of field lines into the paper
+ + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
+ + + + + + + + + + + + + +
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA
t B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA
t B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s Dimension Analysis – Unit Analysis
= N m2 = N m = J = J = J = volt m A s A s A s C s C s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s s
Formula associated with the production of an emf
• emf = potential difference generated measured in volts
BA or m = magnetic flux = magnetic change t t time time B = magnetic field strength in Tesla = 1 N m A A = area = m2
t = s
= N m2 = N m = J = J = J = volt m A s A s A s C s C B strength Area Time s s
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Formula associated with the production of an emf
• emf = potential difference generated
measured in volts
BA or m = magnetic flux = magnetic change
t t time time A = l x l
= B l x l = B l x l = B l V t t
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x