# voltage across resistor

Discussion in 'General Electronics Chat' started by anoopisaac, Oct 15, 2010.

1. ### anoopisaac Thread Starter New Member

Oct 15, 2010
1
0
Hi,
I am newbile to electronics,trying to learn fundamentals. I read that if resistor is present in a circuit , voltage drop across the resistor will be same as that of the battery.So in that case voltage drop between + end of the battery and resistor will be zero, so how come current flows ?

Thank
anoop

2. ### steinar96 Active Member

Apr 18, 2009
239
4
The battery creates energy from chemical reactions which it represents in the form of a positive voltage between it's terminals. When you connect a resistor across it the resistor dissipates this energy.

If we start at the negative end of the battery and work our way up trough it to the positive terminal we will see that the voltage has increased by the battery voltage V. If we continue trough the resistor connected be end back up at the negative terminal and what we see is that the voltage has decreased across the resistor.