> Why do 2 resistances in parallel have same voltage across them?

Why do 2 resistances in parallel have same voltage across them?

Posted at: 2015-01-07 
a circuit, the voltage can be seen as the potential for the charge to do work, while the current is how much charge flows through an object. In every circuit, the total amount of work that can be done, must be done. For example, if you have a 12V battery connected to your car, each charge from that battery must do 12V worth of work before it reaches the end of the circuit.

In a simple parallel circuit, a single charge will pass through one resistor or the other, not both. Therefore the voltage must all be used in the resistor it passes through, which is why both resistors receive the same voltage drop.

Because the wires connecting the ends have very low resistance and thus zero current difference. The same voltage across two resistances results in different current flow in them.

Components in parallel always have the same voltage across them because they are connected to the same points.

Assuming steady state DC, voltage can only exist across a resistance. Well, or a capacitor. But since we're talking about wires and resistors, if R is zero, IR will also be zero. And the imaginary wire connecting the two resistors(talking schematic here and not the real world) has no resistance, and therefore no voltage drop across it.

In parallel circuit having no neutral in between 2 resistance.So voltage is same



But series circuit having neutral (e.g) + - + - the center having (- +) in the e.g act as neutral 0 V so series circuit shares the voltage

That is what in parallel means, ie two paths between the same two voltages.

Because voltage source applies to both resistors at the same joints, But the current will be different if both resistors value are not the same.