Electric circuits voltage flow question

In summary, when the switch is open, all resistors can be disregarded and V2 will display a reading of 12V. When the switch is closed, the reading on V2 will be zero due to the negligible resistance of the wires.
  • #1
TheRedDevil18
408
1

Homework Statement



circuit.jpg


Homework Equations





The Attempt at a Solution



12.1.1) I don't understand why V2 would have a reading of 12V when V=IR and there is no current flowing in the circuit, can someone please explain?

12.1.2) I think I understand why the voltage is 0 and that is because the resistance in the wires are negligible and voltage is dependant on resistance, Correct?
 
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  • #2
1) Since there's no current flowing when the switch is open, all resistors can be disregarded. When you redraw the circuit with no resistors, V2's leads will be connected to the anode and cathode of the battery. Therefore, V2 should display a reading of 12V same as V1.

2) Yes, when the switch is closed (short circuit), the reading on V2 should be zero since the wire's resistance is negligible, or in other words, zero. Applying V=IR will result in V= 0.
 
  • #3
Abstr7ct said:
1) Since there's no current flowing when the switch is open, all resistors can be disregarded. When you redraw the circuit with no resistors, V2's leads will be connected to the anode and cathode of the battery. Therefore, V2 should display a reading of 12V same as V1.

2) Yes, when the switch is closed (short circuit), the reading on V2 should be zero since the wire's resistance is negligible, or in other words, zero. Applying V=IR will result in V= 0.

Ok, that makes sense, Thanks for the explanation
 

1. How is voltage defined in an electric circuit?

Voltage is defined as the potential difference between two points in an electric circuit, which determines the flow of electric charge between those points.

2. What factors affect the voltage in an electric circuit?

The voltage in an electric circuit is affected by the resistance of the circuit, the amount of current flowing through it, and the type of material used to create the circuit.

3. Can voltage flow in both directions in an electric circuit?

Yes, voltage can flow in both directions in an alternating current (AC) circuit. In a direct current (DC) circuit, voltage flows in only one direction.

4. How is voltage measured in an electric circuit?

Voltage is measured in volts (V) using a voltmeter, which is a device that measures the difference in electric potential between two points in a circuit.

5. What is the relationship between voltage and current in an electric circuit?

According to Ohm's Law, the voltage in an electric circuit is directly proportional to the current and inversely proportional to the resistance. This means that as the voltage increases, the current also increases, but as the resistance increases, the current decreases.

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