Current in Series: Why Does It Remain Same?

[Imtiaz Ahmad]

hey, sir i have a question why the current remain same in series combination of resistance?

 

[QuantumQuest]

As you apply a voltage to the two resistors in series, electric current path is through the first and then the second resistor and then back to the voltage source. So effectively, according to Ohm's law: I = V/(R₁ + R₂) and the total current flowing in the circuit, is given by previous relation.So, it is the same for both of resistors.

 

[anorlunda]

Your question is not stated correctly. "remain same" compared to what?

 

[Imtiaz Ahmad]

sorry sir

 

[Imtiaz Ahmad]

thanks sir what about voltage in parallel?

 

[QuantumQuest]

Now, you can figure out this your own, using a similar logic to the first question: what is changing and what remains constant regarding each resistor?

 

[Imtiaz Ahmad]

in series voltage change but current constant

 

[Imtiaz Ahmad]

voltage

 

[Imtiaz Ahmad]

please sir clear my Confusion

 

[phinds]

please sir clear my Confusion

That's VERY hard to do since your statements and questions are completely unclear. Draw a circuit diagram of a circuit that confuses you and let's talk about it.

 

[Imtiaz Ahmad]

my question is
why voltage remain constant in parallel circuit?

 

[cnh1995]

my question is
why voltage remain constant in parallel circuit?

What is your understanding of voltage?

 

[Imtiaz Ahmad]

work done to bring charge

 

[Imtiaz Ahmad]

or it is the energy that provide source to move charge

 

[cnh1995]

or it is the energy that provide source to move charge

work done to bring charge

Those are vague definitions. How do you measure voltage experimentally?

 

[cnh1995]

Those are vague definitions. How do you measure voltage experimentally?

What I want to emphasize is the nature of current and voltage. Current flows "through" a component and voltage is developed "across" a component. Now can you answer your own question?

 

[Imtiaz Ahmad]

By connecting a voltmeter parallel with circuit

 

[Imtiaz Ahmad]

What I want to emphasize is the nature of current and voltage. Current flows "through" a component and voltage is developed "across" a component. Now can you answer your own question?

littlle bit confusion

 

[Imtiaz Ahmad]

mean in parallel component are connected with same point and in series are different

 

[Imtiaz Ahmad]

mean in parallel component are connected with same point and in series are different

so in series current is constant and in parallel voltage

 

[Imtiaz Ahmad]

so in series current is constant and in parallel voltage

m right sir?

 

[Imtiaz Ahmad]

[QUOTE="Imtiaz Ahmad,
mean in parallel component are connected with same point and in series are different

 

[cnh1995]

[QUOTE="Imtiaz Ahmad,
mean in parallel component are connected with same point and in series are different

Right. Components in parallel are connected between same two points. Hence, voltage is same across parallel components. Refer a good book to cement your concepts and try solving a number of problems on circuits. These concepts will be more clear to you then.

 

[Imtiaz Ahmad]

Right. Components in parallel are connected between same two points. Hence, voltage is same across parallel components. Refer a good book to cement your concepts and try solving a number of problems on circuits. These concepts will be more clear to you then.

please tell.

 

[Imtiaz Ahmad]

please tell.

And Thanks

 

[cnh1995]

please tell.

Tell what?

 

[Imtiaz Ahmad]

book

 

[cnh1995]

book

There are many. Good physics books will work. I used Halliday-Resnik, H C Verma and Irodov.

 

[Imtiaz Ahmad]

There are many. Good physics books will work. I used Halliday-Resnik, H C Verma and Irodov.

sir i have no research work but i want so what i do?

 

[sophiecentaur]

hy, sir i have a question why the current remain same in series combination of resistance?

If you consider any of the connections, the same current must come out that goes in. A resistor connected to just one other resistor, the current going through them, in series must be the same because where else could it go at the junction? If you imagine it start to build up at all (i.e. more current out of one than into the other) then, for a 1A current difference, there would be a build up of 1C of charge every second. Have you any idea how many volts there would be to keep 1C of charge at that connection point? If the resistors were separated by, say, 1cm, the forces involved would tear the wires of the circuit apart. (Look up Coulomb Force and work it out for two 1C charges, separated by 1cm - the numbers are huge).