chapter three mutual induction

Question 1

diff mutual induction

Answer 1

it is the interactionbetween two coils kept close to each other when the electric current increases or decreases in the primary coil it causes varition in the magnetic flux linked with the turns of the secondary coil so E.M.F will be generated in the secondary coil

Question 2

expermaent on mutual induction

Answer 2

1. to demonstrate the mutual induction between two coil and verify lenz rule by using two coils

one of them connected to battery , key and rheostat ( primary coil ) while the other connected with a sensitive , middle zero galvanometer ( secondry coil )

procedures

• switch on the primary coil circuit
• switch of the primary coil circuit
• adjusit the rehostat to increases the current
• adjusit the rehostat to decreases the current
• plunge the primary coil into the secondary coil
• move the primary coil away from the secondery coil

NOTE ; both of opposing induced current or foward induced current resist the varition in magnetic flux producing them

Question 3

how to form mutual induction once increase the varition and once decreases the varituion and will happen in each case

Answer 3

1. switch on the primary coil circuit
2. adjusit the rehostat to increases the current
3. plunge the primary coil into the secondary coil

• opposing current will be induced momentarily in the secondary coil [in oppiste direction to the original current in primary coil] causes opposing induced magnetic filed resist the increases in the inducing filed

1. switch of the primary coil circuit
2. adjusit the rehostat to decreases the current
3. move the primary coil away from the secondery coil
   * forward current will be induced momentarily in the secondery coil [in the same direction of the original current in primary coil] causes foward induced magnetic filed resist the decrease in the inducing magnetic filed

Question 4

proof the relation of mutual induction

Answer 4

E_ind & Dø_m \ Dt

Dø_m \ Dt & DI \ Dt

E_ind = DI \ Dt

E_ind = constant DI \ Dt

E_ind = –M x DI \ Dt

NOTE ; E_ind ⇒ secondary coil

DI \ Dt ⇒ primary coil

Question 5

the cofficient mutual induction between two coils OR the mutual inductance

sympol and relation and unit and diff

Answer 5

1. M
2. Eind \ Di \ Dt
3. henry
4. it is the E.M.F induced in the secondary coil when the current passing through the primary coil change by rate 1A \ 1sec

Question 6

diff henary

Answer 6

it is the mutual inductance between two coils when E.M.F of 1 v is induced in the secondary coil when the current passing through primaty coil change at rate 1A\1sec

Question 7

mutual inductance depends on

Answer 7

1. the number of turns
2. the distance between the two coils
3. the magnetic permeability of its core
4. the volume of the coil

Question 8

the mutual induction verfy lenz law GR

Answer 8

both of opposing induced current or foward induced current resist the varition in magnetic flux producing them

1. if the induced magnetic filed increases

• switch on the primary coil circuit
• adjusit the rehostat to increases the current
• plunge the primary coil into the secondary coil

1. if the induced magnetic filed decreases

• switch of the primary coil circuit
• adjusit the rehostat to decreases the current
• move the primary coil away from the secondery coil