Share

## Which Relationship Gives The Value Of R When R3 Is Adjusted So That The Voltmeter Reading Is Zero?

Question

Which Relationship Gives The Value Of R When R3 Is Adjusted So That The Voltmeter Reading Is Zero? looking forward to the answers from the community

in progress
0

relationship 2 weeks
1 Answer
7 views
0
## Answer ( 1 )

When the voltmeter reading is adjusted to zero, this means that there is no potential difference being measured between the two points. This means that the resistance of the resistor in question must be equal to zero, i.e. r 0. Hence, when r3 is adjusted so that the voltmeter reading is zero, then the relationship of value will be r 0.

## Explain what readjusting r3 means

Readjusting r3 means changing the value of r3 so that the voltmeter reading is zero. This is done to determine the relationship between any two other resistance values, such as r1 and r2. To readjust r3, you’ll need to adjust it until the two voltmeter readings are equal.

When readjusting r3, you’ll likely be using a variable resistor to change its value until the two readings become equal. This will help you determine what values for r1 and r2 yield a zero voltage reading on the voltmeter.

Once you readjust r3, it provides valuable information about how the other resistances affect and interact with each other in terms of their overall effect on the circuit’s total resistance. Ultimately, this can help you determine which relationship gives the value of r when all three resistances are adjusted so that they produce a maximum or minimum possible voltage reading on a circuit.

## Explain how the relationship between voltage and current affect r

The relationship between voltage and current has a direct effect on the value of r. It is important to understand how the two are related before you can calculate the value of r.

If the voltage is increased, then the current will be increased as well. This means that if you increase the voltage, then it is likely that the resistance will also increase. On the other hand, if you decrease the voltage, then it is likely that the resistance will decrease as well.

When adjusting r3 so that voltmeter reading is zero, this adjustment will affect both voltage and current. When making this adjustment, it is important to take into account how these changes could influence the resulting value of r — in both directions (up or down). It may mean either increasing or decreasing its value depending on which direction your adjustments have taken you towards with regards to voltage and current.

## Describe methods for determining r when r3 is adjusted so that the voltmeter reading is zero

When r3 is adjusted so that the voltmeter reading is zero, it can be difficult to determine the value of r. There are several methods you can use to try and figure out the value of r in this situation.

First, you could calculate the total resistance (Rt)of all three resistors. This is done by multiplying the individual resistance of each component by the number of components in series (r1*r2*r3). Then you subtract this result from Rt to find the value of r.

Another method is to measure the current through all three resistors. Once you know this information, you can divide it by the voltage across all three components (V/Ir3) to get an accurate reading for each component’s resistance.

Finally, you can also use a mathematical formula such as Ohm’s Law or Kirchoff’s Loop Rule to solve for any unknowns in your circuit, including r when R3 is adjusted so that voltmeter reading is zero.

## Discuss techniques for obtaining the value of r when the relationship between voltage and current is known

When the relationship between voltage and current is known, then a technician can use techniques to calculate the value of r – the resistance within an electrical circuit. One technique can involve adjusting the voltmeter reading to zero and measuring how much current is passing through a given resistor. By plotting separate points on a plane with voltage as one coordinate, and current as another, the technician will be able to establish a relationship between the two readings in order to determine r.

The technician can also use Ohm’s Law, which states that Voltage (V) Current (I) multiplied by Resistance(R). This formula can be easily manipulated to solve for r when V and I are substitued with their respective values.

Finally, the technician may also draw a graph of Voltage vs Current. The steepness of this graph will depend on the ratio of voltage to current at any given point; from there the slop of the line will provide an exact value for resistance based on which points have been plotted.

## Demonstrate a calculation to determine the value of r given readjusted voltage conditions

To determine the value of r, given readjusted voltage conditions, we can use Ohm’s Law to demonstrate a calculation. Using equations for voltage (V), resistance (R) and current (I), we can calculate the value of R when the voltmeter reading is zero.

V I x R

Since V is set to zero, we can write that equation as