Can somebody please answer from A - E Resistance (V/A) R = 10 10 R = 100 100 Exp
ID: 1535352 • Letter: C
Question
Can somebody please answer from A - E
Resistance (V/A)
R = 10
10
R = 100
100
Experiment 2
Procedure 1: Measure Voltage and Current for Resistors in Series
One 100- Resistor
Item
Value
voltage across voltage source
3.169 V
measured current through circuit
0.032 A
resistance of the circuit
100
calculated current through circuit
1 A
current % difference
2 %
voltage across 100- resistor
3.150 V
Two 100- Resistors in Series
Item
Value
voltage across voltage source
3.178 V
measured current through circuit
0.017 A
resistance of the circuit
200
calculated current through circuit
3 A
current % difference
4 %
voltage across 100- resistor
1.582 V
voltage across 100- resistor
1.591 V
voltage across both resistors
3.173 V
Three Resistors in Series
Item
Value
voltage across voltage source
3.203 V
measured current through circuit
0.0029 A
resistance of the circuit
1200
calculated current through circuit
5 A
current % difference
6 %
voltage across 100- resistor
0.263 V
voltage across 100- resistor
0.263 V
voltage across 1000- resistor
2.661 V
voltage across all resistors
3.191 V
Procedure 2: Measure Voltage and Current for Resistors in Parallel
Two 100- Resistors in Parallel
Item
Value
voltage across voltage source
3.163 V
resistance of the circuit
50
measured current through circuit
0.065 A
calculated current through circuit
7 A
current % difference
8 %
voltage across 100- resistor
3.091 V
voltage across 100- resistor
3.091 V
voltage across both resistors
3.091 V
Three Resistors in Parallel
Item
Value
voltage across voltage source
3.159 V
resistance of the circuit
47.6
measured current through circuit
0.066 A
calculated current through circuit
9 A
current % difference
10 %
voltage across 100- resistor
3.082 V
voltage across 100- resistor
3.082 V
voltage across 1000- resistor
3.082 V
voltage across all resistors
3.082 V
Lab report
a) Using the measured current from the table for the three resistors in series, calculate the voltage for the entire circuit. Remember:
V = V1 + V2 + V3 = IR1 + IR2 + IR3 = I(R1 + R2 + R3) = IRtotal.
Multiple choice:
3.48 V 3.38 V 3.29 V 3.34 V
b) Using the the measured current from the table for the three resistors in parallel, calculate the voltage for the entire circuit. Remember:
I = I1 + I2 + I3 = V/R1+ V/R2+ V/R3= V(1/R1+ 1/R2+ 1/R3) = V(1/Requivalent)
You can calculate the value of REquivalent from the other individual resistances as follows:
Requivalent = 1/(1/R1+1/R2+1/R2+….)
Multiple choice:
2.95 V 3.00 V 3.04 V 3.14 V
c) What happens to the current through a series circuit as more resistors are added in series?
) In a series circuit, the current decreases as more resistors are added.
) In a series circuit, the current decreases as more resistors are subtracted.
) In a series circuit, as in a parallel circuit, the current increases as more resistors are added.
) In a series circuit, the current increases as more resistors are added.
d) What happens to the current through a parallel circuit as more resistors are added in parallel?
) In a parallel circuit, the current decreases as more resistors are added.
) In a parallel circuit, as in a series circuit, the current decreases as more resistors are added.
) In a parallel circuit, the current increases as more resistors are removed.
) In a parallel circuit, the current increases as more resistors are added.
e) If a circuit is wired in parallel, a component can be removed without breaking the circuit. For example, you could remove the middle resistor of the three and current would still flow through the circuit. Why are the electrical circuits in houses wired in parallel?
) Parallel electrical circuits allow you to turn off a light in one room without also turning off the TV in the next room (and all the other electrical appliances in the house).
) Series electrical circuits allow you to turn off a light in one room without also turning off the TV in the next room (and all the other electrical appliances in the house).
) Parallel electrical circuits do not allow you to turn off a light in one room without also turning off the TV in the next room (and all the other electrical appliances in the house).
Can somebody please answer from A - E
Resistance (V/A)
R = 10
10
R = 100
100
Explanation / Answer
(a) Total resistance in series, R = 1200 ohm
Current through the circuit, I = 0.0029 A
So, voltage of the entire circuit = I*R = 0.0029*1200 = 3.48 V
So, option 3.48 V is the correct answer.
(b)
The three resistors are -
100, 100, 1000
Req = 1/[1/100 + 1/100 + 1/1000] = 47.62
Current = 0.066 A
Voltage across the circuit = 47.62*0.066 = 3.14 V
Correct option is 3.14 V
(c) First option is correct.
Current decreases.
(d) Last option is correct.
Current increases.
(e) First option is correct.