Voltate, Resistance of open circuit

AI Thread Summary
In an open circuit with a 10V source and a 10-ohm resistor, the voltage between points A and B remains at 10V because there is no current flowing through the circuit. Resistance does not affect the voltage value in this scenario since voltage drop across a resistor requires current to be present. According to Ohm's Law (V=IR), without a closed loop to allow current flow, the resistor does not influence the voltage. Therefore, the voltage remains unchanged until the circuit is completed. Understanding this principle clarifies why resistance does not impact voltage in an open circuit.
yuno96
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There is a open circuit like below figure

A---------R(10ohm)--------V(10V)-------------B

The Voltage between A and B is 10V. The resister do not affect in this circuit. This is what I have learned.

But I do not understand why the resistance do not affect to the voltage value. Please explain the reason in detail.
 
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Before you can get a voltage drop across a resistance (R), you need to have a current (I) through the resistor. I.e. from ohms law, V=IR. So you would need to connect point A to B in order to get a current through the loop.
 
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