Question

Consider the following series circuit with a 105 volt battery and three resistors; R1=4 ohm, R2=5 ohm, and R3=6 ohm a) Will the current in this circuit flow clockwise or counterclockwise? Explain your reasoning in three lines or less. b) What is the equivalent resistance of the three resistors above wired in series, in ohms? c) Draw the equivalent simple circuit. d) Find the current in the equivalent simple circuit, in amps. e) What is the current in the original circuit, in amps? f) Find the voltage drop (loss) across the resistor R3 in volts. g) Find the power dissipated in the resistor R3 in watts. h) Find the power generated by the battery in watts. i) Assume the actual current which is measured in this circuit is considerably smaller than our prediction in part e) above. Give some possible explanation for this. j) Assume the three resistors are lamps and that lamp R3 goes bad and stops glowing. What would happen to lamp R1? Explain your reasoning. What is such a circuit called? k) In what real-life situation are lamps wired as in the circuit above? l) Which lamp will be the least bright? Explain your reasoning. m)All the lamps in the above circuit are dim. Explain in four lines or less why this is so.

Answer #1

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...

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.

Consider the following parallel circuit. The voltage of the
battery is 24 volts. Lamp 1 is rated at 48 watts, and lamp 2 at 72
watts. a) What is the voltage drop (loss) across lamp 1, in volts?
b) What is the voltage drop (loss) across lamp 2, in volts? c) What
is the current which flows through lamp 1, in amps? d) What is the
current that flows through lamp 2, in amps? e) Find the resistance
of lamp...

A circuit consists of three resistors,
R1<R2<R3R1<R2<R3,connected in series to a battery.
A)Rank these resistors in order of decreasing current through
them.
B)Rank these resistors in order of decreasing potential
difference across them.

Resistor R1=3.0 Ohm is connected in series to a parallel
combination of R2=9.0 Ohm and R3=7.0 Ohm. The combination of three
resistors is connected to a real battery of emf 12.0 V. Find
internal resistance of a battery if current through a battery is
0.40 A. Give answer in Ohms.

Resistor R1=3.7 Ohm is connected in series to parallel
combination of resistors R2=7.9 Ohm and R3=11.1 Ohm. This
combination is connected to the ideal battery of V=10.6 V. Find
voltage drop on the resistor 7.9. Give answer in V.

Three resistors having resistances of R1 = 1.52 Ω ,
R2 = 2.32 Ω and R3 = 4.94 Ω respectively, are
connected in series to a 28.4 V battery that has negligible
internal resistance.
Find the equivalent resistance of the combination.
Find the current in each resistor.
Find the total current through the battery.
Find the voltage across each resistor.
Find the power dissipated in each resistor.
Which resistor dissipates the most power, the one with the
greatest resistance or...

Resistors R1 = 20 W, R2 = 40 W,
and R3 = 60 W, are all connected in series with one
another. The combination of three resisters in series is
now connected in parallel with a 240 W resistor, and the resulting
circuit is connected across an ideal 62.5 volt battery.
a) Find the equivalent resistance connected across the
battery.
b) Find the potential across each of the four resistors, and the
current through each.
c) Find the power dissipated by...

. A series-parallel combination of resistors is created from 4
resistors, there is a 45 ohm resistor followed in series by a
parallel combination of a 30 Ohm resistor on one branch, and a 10
Ohm and a 15 Ohm resistors in series on the other branch. The whole
combination is attached to a 12 V battery. a) find the net
resistance of the resistors to the current from the battery. b)
What is the current in the 45 Ohm...

In the circuit shown below, R1, R2, and
R3 are three resistors of different values,
R1 is greater than R2 and R2 is
greater than R3. ℰ is the electromotive force
of the battery whose internal resistance is negligible. Which of
the three resistors has the greatest current flowing through it?
Explain. Show your work

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