Question

5. How are the two headlights on a car wired? in series or in parallel? Explain.

6. Three resistors R1 = 0.1 Ω, R2 = 0.2 Ω, and R3 = 0.3 Ω are connected together in an electric circuit. What is the effective resistance in the circuit if they are connected in:

(a) series in the circuit,

(b) parallel in the circuit.

Answer #1

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Calculate the total resistance of a circuit containing three
resistors wired in parallel when R1 = 100 , R2 = 200 O, and R3= 50
O
Consider that you slightly alter the previous circuit so that R1
and R2 are still in parallel, but R3 is now in series with the
pervious two. What is the total resistance of this
circuit?

If two resistors with resistances R1 and
R2 are connected in parallel, as in the figure
below, then the total resistance R, measured in ohms (Ω),
is given by
1/R= 1/R1+1/R2
If R1 and R2 are
increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast
is R changing when R1 = 80 Ω and
R2 = 110 Ω? (Round your answer to three decimal
places.)

If two resistors with resistances R1 and
R2 are connected in parallel, as in the figure
below, then the total resistance R, measured in ohms (Ω),
is given by
1
R
=
1
R1
+
1
R2
.
If R1 and R2 are
increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast
is R changing when R1 = 50 Ω and
R2 = 60 Ω? (Round your answer to three decimal
places.)

a) If you have one resistor in series (R1) and two resistors in
parallel (R2 and R3), what value of R3 would make the effective
resistance of the circuit equal to R1 and why does that work?
b) If the effective resistance of the same circuit is 5kOhms,
the length is 0.03m and width is 0.02m and we power the circuit by
making the B field increase by 5T every second, what is the current
in the circuit. Include both...

Resistor R1=3.7 Ohm is connected in series to parallel combination
of resistors R2=7.9 Ohm and R3=11.1 Ohm. Find equivalent resistance
of this combination. Give answer in Ohms.
Resistor R1=3.7 Ohm is connected in series to parallel combination
of resistors R2=7.9 Ohm and R3=10.7 Ohm. This combination is
connected to the ideal battery of V=10.6 V. Find current through
the R3. Give answer in A.

Four resistors R1=R2 =1Kohm, R3=R4=2Kohm, are connected in
series, and their combination is connected in parallel with
R5=2Kohm and R6=3Kohm. An ammeter measures an electric current of
3mA flowing through the resistor R5. What is the voltage applied to
the circuit

If R is the total resistance of three resistors,
connected in parallel, with resistances R1,
R2, R3, then
1
R
=
1
R1
+
1
R2
+
1
R3
.
If the resistances are measured in ohms as
R1 = 40 Ω, R2 = 25 Ω, and
R3 = 32 Ω, with a possible error of 0.5% in
each case, estimate the maximum error in the calculated value of
R. (Round your answer to three decimal places.)

Find the equivalent resistance of a resistive network with three
resistors: R1 = 2 Ω (ohm), R2 = 7 Ω (ohm), and R3 = 9 Ω (ohm),
where the series combination of R1 and R2 is in parallel with R3.
In other words: (R1 in series with R2) in parallel with R3. Quote
your answer in Ω (ohm) rounded to one decimal place.

QUESTION 1
How do you connect a voltmeter to a circuit?
a) in series
b) None of the answers is correct.
c) either way is correct
d) in parallel
QUESTION 2
Can you connect a Digital multimeter (Ohmmeter) to a resistor in
circuit to measure the resistance of resistor?
a) No.
b) Yes.
c) Yes, if the Ohmmeter has a low internal resistance.
d) Yes, if the Ohmmeter has a high internal resistance.
QUESTION 3
Three resistors R1, R2 and...

Consider a simple circuit with two resistors connected in
parallel.
R1 = 30.0 Ohm, R2 = 10.0 Ohm, and a 12 V battery
Calculate the following values to one decimal places (enter just
the number)
The equivalent resistance Ohms
The voltage across resistor R1 V
The voltage across resistor R2 V
The current through resistor R1 A
The current through resistor R2 A
Consider a simple circuit with two resistors connected in
series.
R1 = 1.0 Ohm, R2 = 7.0 Ohm, and a 12 V...

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