Changes

= Concept Map =

= Concept Map =

<mm>[[Electromagnetic induction.mm|Flash]]</mm>

[[File:Electromagnetic induction.mm|Flash]]

[[Category:Physics]]

[[Category:Physics]]

= Textbook =

= Textbook =

#Tenth Standart Science Textbook

#Tenth Standart Science Textbook 2014

 

= Additional information =

= Additional information =

==Useful websites==

==Useful websites==

#http://www.youtube.com/watch?v=vwIdZjjd8fo

#http://www.youtube.com/watch?v=vwIdZjjd8fo

#http://www.electronics-tutorials.ws/electromagnetism/electromagnetic-induction.html

#http://www.electronics-tutorials.ws/electromagnetism/electromagnetic-induction.html

#https://www.google.co.in/search?q=electromagnetic+induction&oq=Ele&aqs=chrome.0.69i59l2j69i57j0l3.1895j0j8&sourceid=chrome&es_sm=93&ie=UTF-8

#https://www.google.co.in/searchq=electromagnetic+induction&oq=Ele&aqs=chrome.0.69i59l2j69i57j0l3.1895j0j8&sourceid=chrome&es_sm=93&ie=UTF-8

==Reference Books==

==Reference Books==

 

#Tenth Standard state syllbus text books 2011 and 2014 Science Subject

#Tenth Standard Ready Lesson CD from Education Department – Science Subject

= Teaching Outlines =

= Teaching Outlines =

===Activities===

===Activities===

#Activity 1 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 1|Properties of Magnets]]

#Activity 1 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 1|Properties of Magnets]]

#Activity 2 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 2|Electromagnet experiments]]

#Activity 2 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 2|Electromagnet and electromagnetic induction experiment]]

#Activity 3 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 3|Electromagnetic induction using galvanometer]]

#Activity 3 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 3|Factors influencing e.m.f. & Michel Faraday experiment]]

#Activity 4 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 4|Factors influencing e.m.f.]]

#Activity 5 - [[Electromagnetic_induction_introduction_to_electromagnetic_induction_activity 5|Explanation of Michel Faraday experiment]]

==Concept #2 Fleming right hand rule==

==Concept #2 Fleming right hand rule==

===Notes for teachers===

===Notes for teachers===

'''Direction of induced emf :'''  

'''Direction of induced emf :''' <br>

Fleming’s right hand rule : Stretch the thumb, middle finger and fore finger of your right hand mutually perpendicular to each other as shown in the fig. If the fore finger indicates the direction of magnetic field and the thumb indicates the direction of motion of conductors, then the middle finger will indicate the direction of induced current.  

'''Fleming’s right hand rule :''' <br>

 

Stretch the thumb, middle finger and fore finger of your right hand mutually perpendicular to each other as shown in the fig. If the fore finger indicates the direction of magnetic field and the thumb indicates the direction of motion of conductors, then the middle finger will indicate the direction of induced current. <br>

'''Lenz’s law :''' It states that the direction of induced emf (or induced current) always tends to oppose the cause which produces it.  

'''Lenz’s law :''' It states that the direction of induced emf (or induced current) always tends to oppose the cause which produces it. <br>

(b) When the north pole of the magnet is brought towards one end of the solenoid, the induced current flows in the solenoid in such a direction that the end of the solenoid, near the magnet and becomes a north pole so as to repel the magnet and thus opposes the cause producing the induced current. Therefore e the direction of induced current in solenoid at its end towards the magnet is anti-clockwise.  

(b) When the north pole of the magnet is brought towards one end of the solenoid, the induced current flows in the solenoid in such a direction that the end of the solenoid, near the magnet and becomes a north pole so as to repel the magnet and thus opposes the cause producing the induced current. Therefore e the direction of induced current in solenoid at its end towards the magnet is anti-clockwise. <br>

(d) When the north pole of the magnet recedes form the end of the solenoid, the direction of induced current in the solenoid is such that the end of the solenoid towards the magnet becomes a south pole so as to attract the north pole of the magnet and thus opposes the cause producing it. The current induced current in solenoid at its end clockwise.

(d) When the north pole of the magnet recedes form the end of the solenoid, the direction of induced current in the solenoid is such that the end of the solenoid towards the magnet becomes a south pole so as to attract the north pole of the magnet and thus opposes the cause producing it. The current induced current in solenoid at its end clockwise.

Lenz’s law is wider significance as it implies the law of conservation of energy. It shows that the mechanical energy spent in doing work, against the opposing force experienced by the moving magnet, is transformed into the electrical energy due to which current flows in the solenoid.  

Lenz’s law is wider significance as it implies the law of conservation of energy. It shows that the mechanical energy spent in doing work, against the opposing force experienced by the moving magnet, is transformed into the electrical energy due to which current flows in the solenoid. <br>

'''A.C. Generator:''' An A.C.generator is a device which converts the mechanical energy into the electrical energy using the principle of electromagnetic induction.  

'''A.C. Generator:''' <br>

Frequency of alternating current

An A.C.generator is a device which converts the mechanical energy into the electrical energy using the principle of electromagnetic induction. <br>

In one complete rotation of the coil, we get one cycle of alternating emf in the external circuit. Thus the alternating emf has the frequency equal to the frequency of rotations of the coil.  

''Frequency of alternating current''<br>

If the coil makes n rotations per second. The magnitude of induced emf is given as  

In one complete rotation of the coil, we get one cycle of alternating emf in the external circuit. Thus the alternating emf has the frequency equal to the frequency of rotations of the coil. <br>

E=e0sin2nt

If the coil makes n rotations per second. The magnitude of induced emf is given as <br>

And the current is expressed as i=i0sin2nt

E=e0sin2nt

And the current is expressed as i=i0sin2nt <br>

Where e0 and i0 represent the maximum values of emf and current respectivily. Such a current is called an alternating current.

Where e0 and i0 represent the maximum values of emf and current respectivily. Such a current is called an alternating current.

===Activities===

===Activities===

 

==Concept #3 FLEMING'S LEFT HAND RULE AND WORKING OF MOTOR - ==

==Concept #3 FLEMING'S LEFT HAND RULE AND WORKING OF MOTOR - ==

===Learning objectives===

===Learning objectives===

While using it remembers that the coil should be in the north and south direction. That means the needle and the coil should be parallel to each other.  

While using it remembers that the coil should be in the north and south direction. That means the needle and the coil should be parallel to each other.  

===Activities===

=Assessment Activities for CCE=

= Fun corner =

= Fun corner =