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Catalogs Discussion Forums -> Electricity -> speed of current -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 current  don't  flow from one place to another....when electrons flows from one place to another ..we call it as current....................

 

instantanous velocity of electron = 10^5 m/s......

 

average velocity                             = few inches / sec.............

 

velocity of electromagnetic wave(electric field) = 3* 10^ 8 m/s.....

Catalogs Discussion Forums -> Electricity -> speed of current -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 electric field has velocity of light = 3* 10^ 8 m / s.............but electrons has average velocity.....few inches / sec....but..it has an

instantanous velocity... probably....  10^4 to 10^ 6 m/s..........electrons moves in random manner....so it has less average

velocity...........SPEED OF CURRENT...????.........I think it is meaningless................ because ...current don't flow from one

place to another....when chargesor electron travels from one place to another ....we call it as current......what is the speed of

electron...??....  it is the right question.....?.....well ask questions openly..and try to solve problems yourself....because that is

the only way to learn physics.....wish you good luck..........

Catalogs Discussion Forums -> Electricity -> What does the battery do to make the work done by the charge in a circuit to be zero ? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 I think this question is related with Kirchchoff's law.......

   work done = force * displacement...........voltage = workdone/ charge.........In a closed circuit .....displacement of electron =0..        

so work done by the battery = 0....... so... algebraic sum of voltages in a closed loop = 0 ...... Kirchchoff's 2nd law.........

Catalogs Discussion Forums -> Electricity -> WHY CURRENT IS A SCALAR EVEN THOUGH IT HAS DIRECTION? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 current is neighter scalar nor vector........current is tensor quantity..........it has both magnitude and direction...but it do not obey vector algebra..........

Catalogs Discussion Forums -> Electricity -> cause of attraction between two unlike charges -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 ya.........   it is due to the activity of higg's boson.....   it is fallen under standard model of particle physics ............................    Higg's says that  an infinite no. of very tiny particles called bosons are present in the entire universe.. .....   these particles continuously hit the charges......

                      
                    when 2 like charges come closer ...  they exchange the higg's particle ..........................    so they repeal each other.............
 
                     when 2 unlike charges come closer ....  higg's boson try to come at the state of equilibrium..........  so they  attract each other.................
 
     But scientists can't experimentally proove whether higg's boson is exist...?...or not.......?
 
 
you may heard about the big scientific experiment conducted in Europe . With a big nuclear collider.................   One of its aim is to find whether the Higg's boson or "god's particle " .......................   does exist...or not.........?........     
Catalogs Discussion Forums -> Electricity -> CURRENT vs VELOCITY -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 velocity = displacement/ time ........not mass / time......normally mass do not vary with time......

 

current ,I = amout of charge  passing through cross sectional area/ time........no. of electrons have no importance...charge

carried by electon have importance.......but normally electrons are charge carriers .........so we simply say that current is flow of electrons......but in p-type semiconductor  holes are charge carriers......not electrons...so exact defenition of current is............................ flow of charges.....not flow of electrons.....

unit of current = coloumb/ time.......or amphere......unit of velocity = displacement/ time....

Catalogs Discussion Forums -> Electricity -> potential -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]

for an ideal battery, e.m.f = potential difference....because its internal resistance =0..............I think you have some misunderstanding about e.m.f. and potential difference......the term e.m.f is consider only in the case of battery...not in the case of circuit.........for a battery....e.m.f= potential difference + voltage drop by internal resistance......

the right question will be.........

 Q. when the e.m. f and potential difference of a battery shows the  same value...?

Catalogs Discussion Forums -> Electricity -> electric FEILD -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

electric field inside a conductor is zero......but electric field inside a non conductor is may or may not be equal to zero...

 

         In the case of a conductor , so many  free electrons are present..... if electric field is  present inside the conductor....the free electrons simply kills the electric field(move in opposite  direction of field).......until electric field becomes zero.......

 

         In the case of non conductor ...ther is no free electrons.....so even an electric field is present inside the non conductor.....electrons do not change its position....so electric  field do not become zero.......

eg:- air.  (in the case of non conducor it is does not matter whether it is sphere, squar, ...because there is no free electrons......).....

Catalogs Discussion Forums -> Electricity -> charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 due to friction the outermost electron of glass is get energized..........and move to silk......I think this is the role of mechanical energy.......

Catalogs Discussion Forums -> Electricity -> E.M.F -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 e.m.f = potential energy + energy losed due to internal resistance

Catalogs Discussion Forums -> Electricity -> E.M.F -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 e.m.f .is greater than potential difference........e.m.f. means electromotive force.......the maximum electrical energy (potential difference) carried by the cell.......& at the terminal of the battery.....we get electrical energy less than that of e.m.f....due to internal resistance of the cell.....i.e,

                             e.m.f . = potential difference + internal resistance

Catalogs Discussion Forums -> Electricity -> charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 electric field and electric potential energy  are enterly different..... don't confuse them.....see video lecture by MIT proffesers......then you can understand it better.....

Catalogs Discussion Forums -> Electricity -> charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 if we rubb glass with silk.....glass loses its electron.....due to the force by rubbing....mechanical energy...... electrons  from glass road moves to silk......thus glass is become positive silk is become negative....this works only for some substances.... 

Catalogs Discussion Forums -> Electricity -> Charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 thanks

Catalogs Discussion Forums -> Electricity -> Charge -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]

 ya.........   it is due to the activity of higg's boson.....   it is fallen under standard model of particle physics ............................    Higg's says that  an infinite no. of very tiny particles called bosons are present in the entire universe.. .....   these particles continuously hit the charges......

                      
                    when 2 like charges come closer ...  they exchange the higg's particle ..........................    so they repeal each other.............
 
                     when 2 unlike charges come closer ....  higg's boson try to come at the state of equilibrium..........  so they  attract each other.................
 
     But scientists can't experimentally proove whether higg's boson is exist...?...or not.......?
 
 
you may heard about the big scientific experiment conducted in Europe . With a big nuclear collider.................   One of its aim is to find whether the Higg's boson or "god's particle " .......................   does exist...or not.........?........     
Catalogs Discussion Forums -> Electricity -> Charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Charge
Catalogs Discussion Forums -> Electricity -> Charge -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 protons have positive charge....protons can not removed from a body .....so total charge can not be tranfered......

Catalogs Discussion Forums -> Electricity -> If a proton and electron r placed in same uniform electric field, they experience different accelera -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 It is due to the applied voltage across the series of capacitors.......  if a battery have +5v and +5v terminals ...then it is useless..if it have +10v &0v...or +5v &-5v........its voltage(potential difference) is 10v.......

Catalogs Discussion Forums -> Electricity -> existence of atom -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 thanks..............

Catalogs Discussion Forums -> Electricity -> If a proton and electron r placed in same uniform electric field, they experience different accelera -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
If they have EQUAL AMOUNT of +ve charge, their potentials are same ...then potential difference = 0.....
 
 
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