Question

Table 2: Current measurements Resistors in the circuit Voltage, V (V) Current, I (A) Resistance, R (?) R1 (Nominal value = 47 ?) 9V 0.19A 47 ? R2 (Nominal value = 100 ?) 9V 0.09A 100 ? R1 and R2 in series 9V 0.06A 147? Table 3: Measurements Current position Current, I (A) Current before, R1 0.07A Current between R1 and R2 0.07A Current after R2 0.07A Evaluation 1. Explain the observation you made in Table 1. 2. Calculate the values for resistance R1 and R2 as well as the resistance (RT) for the series connection of the components and enter the values in the last column of Table 2. With possible measurement errors in mind, what general relationship can you see between total resistance RT and the values for partial resistance? Explain this relationship and write an equation to express it. 3. Express the findings entered in Table 3 in your own words and write an equation to express the results. Explain the findings.

          Table 2: Current measurements
Resistors in the circuit
Voltage, V (V)
Current, I (A)
Resistance, R (?)
R1 (Nominal value = 47 ?)
9V
0.19A
47 ?
R2 (Nominal value = 100 ?)
9V
0.09A
100 ?
R1 and R2 in series
9V
0.06A
147?

Table 3: Measurements
Current position
Current, I (A)
Current before, R1
0.07A
Current between R1 and R2
0.07A
Current after R2
0.07A

Evaluation
1. Explain the observation you made in Table 1.
2. Calculate the values for resistance R1 and R2 as well as the resistance (RT) for the series connection of the components and enter the values in the last column of Table 2. With possible measurement errors in mind, what general relationship can you see between total resistance RT and the values for partial resistance? Explain this relationship and write an equation to express it.
3. Express the findings entered in Table 3 in your own words and write an equation to express the results. Explain the findings.

Table 2: Current measurements
Resistors in the circuit
Voltage, V (V)
Current, I (A)
Resistance, R (?)
R1 (Nominal value = 47 ?)
9V
0.19A
47 ?
R2 (Nominal value = 100 ?)
9V
0.09A
100 ?
R1 and R2 in series
9V
0.06A
147?

Table 3: Measurements
Current position
Current, I (A)
Current before, R1
0.07A
Current between R1 and R2
0.07A
Current after R2
0.07A

Evaluation
1. Explain the observation you made in Table 1.
2. Calculate the values for resistance R1 and R2 as well as the resistance (RT) for the series connection of the components and enter the values in the last column of Table 2. With possible measurement errors in mind, what general relationship can you see between total resistance RT and the values for partial resistance? Explain this relationship and write an equation to express it.
3. Express the findings entered in Table 3 in your own words and write an equation to express the results. Explain the findings.

Added by Denise S.

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