How Does Changing the Voltmeter Affect Potential Difference Readings?

[sallyishyper]

potential difference?

Homework Statement

picture shown in attachment

The sliders are at the mid-point of the potential dividers.
1. Find the potential difference recorded by a digital voltmeter of infinite resistance connected as the voltmeter V in each circuit.
250/2 = 125
6/250=0.024A and 100/2=50
0.024*125 =3V 10/100=0.1A
0.1*50 = 5V



2. The digital voltmeter is replaced by a moving coil voltmeter of resistance 500 ohms. Calculate the new readings when using this meter.


?
For this question I have tried to work out the conductance, then from this the total resistance and Ohms law to find the current. Then using Ohms law again try to find the potential difference, but I came out with an answer of minus 7.

Homework Equations

V=IR (i think)

The Attempt at a Solution

"
?
For this question I have tried to work out the conductance, then from this the total resistance and Ohms law to find the current. Then using Ohms law again try to find the potential difference, but I came out with an answer of minus 7."

 

[Redbelly98]

#1 looks good.

For #2, can you show your steps in coming up with your answer?

 

[thomate1]

I would like to clarify that the term "potential difference" refers to the difference in electrical potential between two points in an electric circuit. It is measured in volts (V) and is represented by the symbol ΔV or V. In the given scenario, it seems that the potential difference is being calculated by using Ohm's law, which states that the potential difference (V) is equal to the current (I) multiplied by the resistance (R). However, it is important to note that potential difference can also be affected by other factors such as the type of circuit and the materials used. Therefore, it is necessary to provide more information and context in order to accurately calculate the potential difference in this scenario.