Homework Answers
1)True.
Capacitors store harge.They have two metal plates where charge is stored,separated by an insulating dielectric.
2)False.
Ampere is the unit of electric current. A capacitors capacitance unit is Farad.
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QUESTION 1 Capacitors are circuit devices that can store charge.? True False QUESTION 2 A Capacitors...
True/False. Electrolytic capacitors are polarized. 2. The figure below shows a charge curve of the capacitor...
True/False. Electrolytic capacitors are polarized. 2. The figure below shows a charge curve of the capacitor in a RC circuit. Answer the following questions. Factors ▲Print to, Format Disk (1) What is the total time span of the screen? (2) Estimate the voliagecose pacitor aer it s flly arg (3) Estimate the time constant of the RC circuit. (4) Ifthe capacitance is 1000 μF, estimate the resistance.
QUESTION 5 A Capacitors charge is represented as Q and its units is Coulombs True False...
QUESTION 5 A Capacitors charge is represented as Q and its units is Coulombs True False QUESTION 6 A capacitor with an initial potential difference of 10 Vis discharged through a resistor when a switch between them is closed at t= 0. At t= 10.0 s, the potential difference across the capacitor is 0.5 V. What is the time constant of the circuit? 3.34 sec 2.94 sec 4.02 sec 7.14 sec
Question 1 (2 points) Question 7 (2 points) Circuit protection devices limit excess voltage current or power Fuses are just wire inside a case that melts True True False Question 8 (2 points) Que...
Question 1 (2 points) Question 7 (2 points) Circuit protection devices limit excess voltage current or power Fuses are just wire inside a case that melts True True False Question 8 (2 points) Question 2 (2 points) A lightning rod is better than a lightning arrester The best trip element to use to protect a circuit from both small long-lasting overloads and large bursts of current is True False Question 9 (2 points) they are all the same Circuit breakers...
capacitors charge up faster than they discharge. TRUE/FALSE?
capacitors charge up faster than they discharge. TRUE/FALSE?
In the circuit below, with the capacitors fully charged, the charge stored on C1 is equal...
In the circuit below, with the capacitors fully charged, the
charge stored on C1 is equal to the charge stored on C2. If the
capacitance of C1 = 5 pF and C2 = 3 pF, what is the capacitance of
C3?
C2
Section 9: Energy in capacitors 28.9.1 In an electronic circuit, you need a capacitor to store...
Section 9: Energy in capacitors 28.9.1 In an electronic circuit, you need a capacitor to store 4.000e-9 J of energy. You (5.00) have 1.50 volts available to charge it with. What capacitance should you choose? x 5.33e-9 Save 28.9.1 (4/5 submissions used) F Submit 28.9.1
True power for an inductor is measured in VAR rather than watts Select one: O True...
True power for an inductor is measured in VAR rather than watts Select one: O True O False The power factor is equal to one for purely reactive loads. Select one OTrue O False Energy dissipation occurs only in the resistive part of a circuit since ideal inductors and capacitors merely store and release energy Select one OTrue O False The unit of apparent power is the volt-ampere Select one True O False
Question 1 Two capacitors are connected in parallel across the terminals of a battery. One has...
Question 1 Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.8/F and the other a capacitance of S.2IF. These two capacitors together store 7.6 x 105 C of charge. What is the voltage of the battery? Number the tolerance is +/-2% Units
1. Are the two capacitors shown in the circuit in series, or in parallel? a)Parallel b)...
1. Are the two capacitors shown in the circuit in series, or in
parallel?
a)Parallel
b) Series
2. Calculate the equivalent capacitance between points A and B
for the circuit shown. All the capacitors are 17 μF each. Give your
answer in μF.
3. In an R-C circuit the resistance is 171 Ω and Capacitance is
40 μF, what will be the time constant? Give your answer in
milliseconds.
4. The time constant of an RC circuit is the time...
Fig. 1 shows a circuit of four capacitors connected to a battery with a potential difference...
Fig. 1 shows a circuit of four capacitors connected to a
battery with a potential difference ?_0. Capacitor 4 is filled with
a dielectric with 0 dielectric constant ? = 4. The capacitance
value of the capacitors is equal ?1 =?2 = ?3 = ?. The capacitance
of capacitor 4 is also equal to ? / 2 when in the middle of
their plates there is no dielectric. a) Calculate the free
charge stored in the capacitor 4. Its
answer...
True/False. Electrolytic capacitors are polarized. 2. The figure below shows a charge curve of the capacitor in a RC circuit. Answer the following questions. Factors ▲Print to, Format Disk (1) What is the total time span of the screen? (2) Estimate the voliagecose pacitor aer it s flly arg (3) Estimate the time constant of the RC circuit. (4) Ifthe capacitance is 1000 μF, estimate the resistance.
QUESTION 5 A Capacitors charge is represented as Q and its units is Coulombs True False QUESTION 6 A capacitor with an initial potential difference of 10 Vis discharged through a resistor when a switch between them is closed at t= 0. At t= 10.0 s, the potential difference across the capacitor is 0.5 V. What is the time constant of the circuit? 3.34 sec 2.94 sec 4.02 sec 7.14 sec
Question 1 (2 points) Question 7 (2 points) Circuit protection devices limit excess voltage current or power Fuses are just wire inside a case that melts True True False Question 8 (2 points) Question 2 (2 points) A lightning rod is better than a lightning arrester The best trip element to use to protect a circuit from both small long-lasting overloads and large bursts of current is True False Question 9 (2 points) they are all the same Circuit breakers...
In the circuit below, with the capacitors fully charged, the
charge stored on C1 is equal to the charge stored on C2. If the
capacitance of C1 = 5 pF and C2 = 3 pF, what is the capacitance of
C3?
C2
Section 9: Energy in capacitors 28.9.1 In an electronic circuit, you need a capacitor to store 4.000e-9 J of energy. You (5.00) have 1.50 volts available to charge it with. What capacitance should you choose? x 5.33e-9 Save 28.9.1 (4/5 submissions used) F Submit 28.9.1
True power for an inductor is measured in VAR rather than watts Select one: O True O False The power factor is equal to one for purely reactive loads. Select one OTrue O False Energy dissipation occurs only in the resistive part of a circuit since ideal inductors and capacitors merely store and release energy Select one OTrue O False The unit of apparent power is the volt-ampere Select one True O False
Question 1 Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.8/F and the other a capacitance of S.2IF. These two capacitors together store 7.6 x 105 C of charge. What is the voltage of the battery? Number the tolerance is +/-2% Units
1. Are the two capacitors shown in the circuit in series, or in
parallel?
a)Parallel
b) Series
2. Calculate the equivalent capacitance between points A and B
for the circuit shown. All the capacitors are 17 μF each. Give your
answer in μF.
3. In an R-C circuit the resistance is 171 Ω and Capacitance is
40 μF, what will be the time constant? Give your answer in
milliseconds.
4. The time constant of an RC circuit is the time...
Fig. 1 shows a circuit of four capacitors connected to a
battery with a potential difference ?_0. Capacitor 4 is filled with
a dielectric with 0 dielectric constant ? = 4. The capacitance
value of the capacitors is equal ?1 =?2 = ?3 = ?. The capacitance
of capacitor 4 is also equal to ? / 2 when in the middle of
their plates there is no dielectric. a) Calculate the free
charge stored in the capacitor 4. Its
answer...
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