IIT JEE , AIEEE Forum - Physics , Electricity

harsh.anurag

it is a known fact tht if 2 resistors r in series then the current flowing through them will be the same

but let us think it in terms of flow of electrons

in the diagram given the 2 resistrs r of different values

let R1 be gr8r than R2

nw this means tht R1 WILL HINDER THE FLOW OF ELECTRONS MOR THAN THT R2 WILL DO

so in a given time less electrons will flow through R1 than R2 bcoz it hinders the flow of electrons more

so hoW can they be in series or rather if 2 resistors r connectd in series hw can the same current flow through them??????????????????????????.................................

kane

because the current which flows through both the resistors does not depend upon the individual resistances it depends upon both.this cureent is V/R1 + R2. clearly it depends on both the resistances.

harsh.anurag

could u plzz specify a little mor
i mean cud u tell me wat is rong in my arguement
nd regarding yr ans
wat does it matter if the current depends on both trhe resistors >>......

ultimator

The problem with ur explanation is, u hv not considered voltage differences at all ! As thr is a greater p.d. across the higher resistance, the rate of flow still conitues to remain the same, as they get pulled by a stronger force now ! Got it ?

harsh.anurag

How can we say tht the pd acrs the higher resistance is more

consider the situation given in the diagrm

surely the pd across R1 will be less ........

so wat can we say abt this situation.......

harsh.anurag

plzzzzz
any answer yaar
cmon any1 plzz do reply.....

karthik2007

the resistors only hinder the flow of electrons, but don't stop them from moving to the other side!

harsh.anurag

@karthik2007
so thts wat i m telling
wont they affect the rate of flow of electrons
i think they will surely do
nd if they will then they will surely affect the rate of flow of electrons ........

harsh.anurag

@karthik2007
so thts wat i m telling
wont they affect the rate of flow of electrons
i think they will surely do
nd if they will then they will surely affect the rate of flow of electrons ........

harsh92

according to you as the resistanceis differrent current flowing through it must be different which is not wrong if u connect them indivisually with the battery but when u are connecting them in series the resistances are acting as net resistance and not as indivisual resistance which u can determine experimentally also.

i have done this experiment at school and u must also have done it or will do it

ultimator

Why do u say my answer is not right ?

Look, the actual answer is the number of electrons entereing a pt at a given period of time is equal to the number of electrons leaving that point in the same given amount of time. This is also called as Kirchoff's Law.

In the given case, current is the same. So, the greater resistance will have greater p.d. across it !!!

indrajeet_bariar

@harsh
OK HARSH LETS COUNTER UR ARGUMENT. SEE, LET US TAKE AN EXAMPLE OF A ONE LANE ROAD. NOW IN THE FRONT THERE IS A BYCYCLE, AFTER IT A BIKE AND THEN BEHIND IT A CAR. NOW THE CAR AND BIKE CAN TRAVEL FASTER THAN THE CYCLE BUT THEY ALL WILL HAVE TO TRAVEL WITH THE SPEDD OF THE CYCLE. SIMILAR IS THE CASE WID ELECTRONS. U SAID THT THE RESISTABCE OF R1 IS GREATER .OK THEN IT WILL HINDER THE FLOW OF ELECTRONS . NOW THE AMOUNT OF CHARGE FLOWING THROUGH R1 PER SECOND(THT IS CURRENT) IS THE SAME AMOUNT THT WILL HAVE TO FLOW THROUGH R2 COZ. ONLY THT AMOUNT IS ALLOWED TO PASS THROUGH R1. THTS WHY WE CAN SAY THT THE CURRENT IS SAME IN CASE OF SERIES COMBINATION.
HOPE U GOT UR ANSWER NOW.

RATE............ IF SATISFIED

sathya_crazyteen

@ indrajit gud line of thinking!!!