SELF INDUCTION

  

       Activity: 1

       Required appliances:

  

       Choke-----1

       plastic wire:------5mts.

       bulb 60W:------1

       Bulb holder---1

       plug pin---1

   PROCEDURE:

   Experiment.1

      Connect the holder and bulb with  plug pin  and it is connected to AC mains. Note the intensity of  light.

   Experiment.2

      Repeat the experiment by connecting choke in series with the bulb.(choke is to be connected in phase line)                                     .     Note the intensity of glow of this bulb.It will be decreased.

  Why.......?

    

  WORK SHEET 1

      
.Hcp _Äv_pw 6 thmÄv«v F.kn t{kmXÊpw \ofapÅ IhNnX sN¼v I¼n D]tbmKn¨v _Ôn¸n¨v {]Imin¸n¡p¶p. \ofapÅ sN¼v I¼nsb Npcpfm¡nbt¸mÄ {]ImiXo{hX IpdªXmbn I­q

F)IhNnX I¼nsb Npcpfm¡nbt¸mÄ AXv GXv t]cn Adnbs¸Sp¶p.?                                (1)

_n)IhNnXNmeI I¼n Npcpfm¡nbt¸mÄv _Äv_nsâ {]ImiXo{hX IpdªXv F´v sIm­bncn¡pw?                                                                                                                               (2)

kn)Cu XXzw D]tbmKn¨v {]hÀ¯n¡p¶ Hcp D]IcW¯nvsâ t]cv FgpXpI.

                                                                           (Courtesy-Quarterly exam question)
WORK SHEET  2 

   ടി വി ആന്റിന വയര്‍ ചുരുട്ട്യിടരുത് .എന്തുകൊണ്ട് ?

 SELF INDUCTION TAKES PLACE ONLY IN AC CERCUIT


   If you use D C connect a switch to ON/OFF. Self induction takes place while switch OFF.


   A video self induction D C with switch                                                        physics/chemistry important points
 SSLC 2012 PHYSICS ANSWERS (Malayalam)
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MUTUAL INDUCTION

 mutual induction

WATCH CAREFULLY ABOVE VEDIO

ANSWER THE FOLLOWING QUESTIONS

1) If D C battery is  connected to primary circuit.what is your observation? justify your answer?

2) IF D C dynamo is connected to primary,what is your observation? Justify your answer?

Experiment for question(2)

   substance required

    An AC stepdown transformer of 6 volt

    Two  PVC pipes 20 cm. length,of diferent radius.

    28 gauge insulated copper wire 100 grams.

    22gauge insulated copper wire 100 gm.  

    A diode(No.1408)

    A  L E D.

    procedure

   Wound 28 gauge wire on larger radius pipe in 250 times(primary),wound 22gauge wire on another pipe in 350 times(secondary) and it is connected to LED.

Solder diode to output of  transformer and connected  to primary coil.

Transformer is to be connected to AC mains.

Slowly secondary pipe is inserted in primary pipe.

observation

The LED will glow.

WARNING

THIS EXPERIMENT IS TO BE  DONE IN THE PRESENCE OF TEACHER


videosMutual induction of two coils 
         mutual induction
             transformer
More questons   onam exam(malyalam) /webs/vedios

SSLC 2012 PHYSICS ANSWERS (Malayalam)
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physics/chemistry important points

   

ELECTRMAGNETIC INDUCTION

WORK SHEET  1

In Electromagnetic experiment(refer figure in Text)Insert a bar magnet inside a insulated copper coil connected to a galvanometer.


Question
1)Suppose you move the magnet and the coil in same direction with same speed.what is your   observation?.justify your answer?


2)How will you increase emf. generating from this experiment?
(Lenz's law- The EMF generated is proportional to the rate of change of the magnetic flux.)


3)Name two instruments working by using this principle?



video

More questons   onam exam(malyalam) /webs/vedios

physics/chemistry important points


SSLC 2012 PHYSICS ANSWERS (Malayalam)
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