will changing the resistance also change the potential difference(voltage)?

Question

also expln: after passing thru a resistance- does voltage change.?
if no...then why not

Answer 1

A resistor directly connected to a voltage source and ground will not change the potential difference if you vary the resistance.
Otherwise yes, the voltage drop will change. When you change the resistance of a path you change the current flowing, current = Voltage/ Resistance.

Answer 2

If your power source is not designed to maintain the voltage, then the voltage will change somewhat, though mostly what you affect is current. Voltage is a difference in electrical potential between two points in a circuit -- if you have a battery supplying constant voltage on one side and a load on the other end that starts at zero electrical potential (because it's not running), adding a resistor in the line won't make the battery supply more voltage any more than it can make the load drop below zero electrical potential.

Think of it like water in a hose. The city provides your water at around 60 psi, and generally, this doesn't change much. On the end of your hose, you have a spray nozzle with a certain amount of restriction to it, providing a certain resistance to flow. Now you put a kink in the hose -- adding more resistance. The pressure from the city doesn't change, but the amount of flow through your hose does. The overall pressure potential is the same -- 60 psi at the source, atmospheric pressure at the end of the spray nozzle, but now the inlet of the spray nozzle sees less than 60 psi due to the kink you put in the hose. So it depends on whether you're talking about the entire circuit or only the part that is "downstream" of the added resistance.

Answer 3

The answer to your question goes back to the fundemental formula of electricity, Ohm's Law. It states E=I*R, where E is voltage, I is current, and R is the resistance. Therefore, the formula may also be written I=E/R. So then if the value of I remains constant, then changing the resistance must by nature change the voltage. In answer to your second question, it is actually a subset of the first question. Voltage does not pass. It is the force that compells the current to flow through a resistance. The three values are interelated. The voltage value measured across a resistance will always be constant, assuming that the current remains the same. If one variable remails constant and a second one is changed, the third will change in accordance the formula of Ohm's Law

Answer 4

in the adventure that your skill source isn't designed to maintain the voltage, then the voltage will substitute rather, even with the incontrovertible fact that often what you influence is modern-day. Voltage is a distinction in electric skill between 2 factors in a circuit -- in case you have a battery offering consistent voltage on one section and a load on the different end that starts off at 0 electric skill (because of the fact it is not working), including a resistor interior the line won't make the battery furnish greater voltage to any extent further than it could make the burden drop under 0 electric skill. think of of it like water in a hose. the city promises your water at around 60 psi, and frequently, this does not substitute plenty. on the tip of your hose, you have a twig nozzle with a undeniable volume of limit to it, offering a undeniable resistance to pass. Now you place a kink interior the hose -- including greater resistance. The rigidity from the city does not substitute, however the quantity of pass by using your hose does. the final rigidity skill is the comparable -- 60 psi on the source, atmospheric rigidity on the tip of the spray nozzle, yet now the inlet of the spray nozzle sees decrease than 60 psi because of the kink you put in the hose. So it relies upon on no count in case you're conversing in regards to the completed circuit or in basic terms the section it is "downstream" of the further resistance.