when capacitor act as open circuit?

when capacitor act as open circuit?
by

1 Answer

Answer :

When a DC is applied to capacitor it acts as open circuit .
by

Related questions

When measuring strain, ballast circuit use a capacitor to act as a high pass filter. This is done when:

Description : When measuring strain, ballast circuit use a capacitor to act as a high pass filter. This is done when:  a) Static strain are being measured b) Dynamic strain are being measured c) Both Static and dynamic strain are being measured d) None of the above

Last Answer : When measuring strain, ballast circuit use a capacitor to act as a high pass filter. This is done when: Dynamic strain are being measured

The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within the envelope C. counteract the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Description : The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within ... the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Last Answer : Answer: A

When a capacitor is connected in series with a Marconi antenna? A. Antenna open circuit stops transmission B. An inductor of equal value must be added C. No change occurs to antenna D. Antenna resonant frequency increases

Description : When a capacitor is connected in series with a Marconi antenna? A. Antenna open circuit stops transmission B. An inductor of equal value must be added C. No change occurs to antenna D. Antenna resonant frequency increases

Last Answer : D. Antenna resonant frequency increases

A capacitor and coil in parallel is called

Description : A capacitor and coil in parallel is called

Last Answer : 1. A tuned circuit

A dielectric material is placed in between the plates of a capacitor, it

Last Answer : A dielectric material is placed in between the plates of a capacitor, it Increases the capacitance.

In a power supply a shorted input capacitor is likely to result in

Last Answer : In a power supply a shorted input capacitor is likely to result in No voltage output.

A capacitor stores energy in

Last Answer : A capacitor stores energy in Dielectric dipole

The capacitor charging current is

Last Answer : The capacitor charging current is An exponential growth function

The voltage across a capacitor _____ the current through it by ______

Last Answer : The voltage across a capacitor Lags the current through it by 90

For a pure capacitor, the voltage current relationship is:

Last Answer : For a pure capacitor, the voltage-current relationship is: Voltage lags current by 90*

Why shunt capacitor is used?

Description : Why shunt capacitor is used?

Last Answer : To improve voltage at receiving end and power factor

Why capacitor bank is used?

Description : Why capacitor bank is used?

Last Answer : In industrial or factory used E.B Power supply must be maintained above 0.90 power factor is compulsory for avoid EB Penalty. So APFC ( automatic Power factor control ) panel is used to maintained balance the load and PF maintained.

How do you charge a capacitor with a battery?

Description : How do you charge a capacitor with a battery?

Last Answer : The  capacitor  is  connected   in  parallel  with   the  battery.

What is the symbol of a capacitor?

Description : What is the symbol of a capacitor?

Last Answer : symbol of a capacitor

Which side of a capacitor is negative?

Description : Which side of a capacitor is negative?

Last Answer : In electrolytic type negative is shorter lead and usually mark in the tank. But of course not applicable to non-polar.

does capacitor store energy ?

Description : does capacitor store energy ?

Last Answer : yes capacitor stores energy

which capacitor stores more charge ?

Description : which capacitor stores more charge ?

Last Answer : supercapacitor

what does a capacitor do?

Description : what does a capacitor do?

Last Answer : It store energy in.the form of charges It allows AC but restricted DC

The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and...

Description : The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is:  (1) 25 ohm (2) 50 ohm (3) 75 ohm (4) 100 ohm

Last Answer : The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is 25 ohm.

In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when the switch S is closed, is

Description : In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when the switch S is closed, is

Last Answer : In the circuit shown in the figure, the capacitor C is charged to a potential Vo. The heat generated in the circuit when ... )^(2)` D. `8 CV _(0)^(2)`

In an L-C circuit shown in figure C=1F, L=4H At time t=0, charge in the capacitor is 4C and it is decreasing at a rate of `sqrt5 C//s` Choose the corr

Description : In an L-C circuit shown in figure C=1F, L=4H At time t=0, charge in the capacitor is 4C and it is decreasing at a rate of `sqrt5 C//s` Choose the corr

Last Answer : In an L-C circuit shown in figure C=1F, L=4H At time t=0, charge in the capacitor is 4C and it is ... a and b are correct D. Both a and b are wrong

In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 C` and it is decreasing at the rate of `sqrt(5)

Description : In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 C` and it is decreasing at the rate of `sqrt(5)

Last Answer : In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 ... ))` C. `2tan^(-1)((2)/(3)) D. None of these

In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 C` and it is decreasing at the rate of `sqrt(5)

Description : In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 C` and it is decreasing at the rate of `sqrt(5)

Last Answer : In an `LC` circuit shows in Fig. `C = 1 F`, `L = 4 H`. At time `t = 0`, charge in the capacitor is `4 ... statement. A. 6 C B. 8 C C. 10 C D. 12 C

An L-C circuit contains a 0.60 H inductor and a `25muF` capacitor is `3.0xx10^(-5)C?`

Description : An L-C circuit contains a 0.60 H inductor and a `25muF` capacitor is `3.0xx10^(-5)C?`

Last Answer : An L-C circuit contains a 0.60 H inductor and a `25muF` capacitor is `3.0xx10^(-5)C?`

What is the capacitive resistance of a 0.04 microfarad capacitor in ac circuit that has a frequency of 1000 hz?

Description : What is the capacitive resistance of a 0.04 microfarad capacitor in ac circuit that has a frequency of 1000 hz?

Last Answer : The capacitive reactance is approximately 4 kΩ .

Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor

Description : Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor

Last Answer : Ans: B

A capacitor (condenser) is used in an electrical circuit to (a) step down voltage (b) step up voltage (c) store electric charge (d) produce electric charge

Description : A capacitor (condenser) is used in an electrical circuit to (a) step down voltage (b) step up voltage (c) store electric charge (d) produce electric charge

Last Answer : Ans:(c)

In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes more efficient at lower capacitance. C. the arrangement allows the coupling of the signal while it isolates the biasing of each stage. D. good frequency response.

Description : In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes ... of the signal while it isolates the biasing of each stage. D. good frequency response.

Last Answer : Answer: C

In the illustration, the small battery and Rb are in the circuit to apply ________. EL-0022 A. forward bias to the emitter-base B. reverse bias to the emitter-base C. a 'reference charge' on the input capacitor D. a buffer between the input ground and the emitter ground

Description : In the illustration, the small battery and Rb are in the circuit to apply ________. EL-0022 A. forward bias to the emitter-base B. reverse bias to the emitter-base C. a 'reference charge' on the input capacitor D. a buffer between the input ground and the emitter ground

Last Answer : Answer: A

What is the value of the capacitor in the astern valve position circuit shown in the illustration? EL-0099 A. 100 kFarad B. 0.5 microfarad C. 0.5 millifarad D. 50 kFarad

Description : What is the value of the capacitor in the astern valve position circuit shown in the illustration? EL-0099 A. 100 kFarad B. 0.5 microfarad C. 0.5 millifarad D. 50 kFarad

Last Answer : Answer: B

In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Last Answer : Answer: D

When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment away. B. Measure capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Description : When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment ... capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Last Answer : Answer: C

Electric circuits are protected against overloads and short circuits by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Description : Electric circuits are protected against overloads and short circuits by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Last Answer : Answer: A

When troubleshooting a console circuit card suspected of being faulty, first check operating voltages, clean the card and then _________________. A. make sure wired connections and push-on connectors are tight B. test each resistor and capacitor on the card with an ohmmeter C. check the continuity of all printed circuit traces with an ohmmeter D. measure the gain of each transistor or integrated circuit

Description : When troubleshooting a console circuit card suspected of being faulty, first check operating voltages, clean the card and then _________________. A. make sure wired connections and push-on connectors ... circuit traces with an ohmmeter D. measure the gain of each transistor or integrated circuit

Last Answer : Answer: A

Capacitance in an AC circuit will _____________. A. stop current flow once the capacitor is fully charged B. allow current flow in only one direction C. oppose any change in circuit voltage D. rectify the current

Description : Capacitance in an AC circuit will _____________. A. stop current flow once the capacitor is fully charged B. allow current flow in only one direction C. oppose any change in circuit voltage D. rectify the current

Last Answer : Answer: C

Before touching a small capacitor connected to a de-energized circuit, or even one that is completely disconnected, you should ____________. A. gently tap the body with a screwdriver B. tag it with a de-energized tag C. be equipped with an insulated fuse puller D. short circuit the terminals to make sure that the capacitor is discharged

Description : Before touching a small capacitor connected to a de-energized circuit, or even one that is completely disconnected, you should ____________. A. gently tap the body with a screwdriver B. tag it ... insulated fuse puller D. short circuit the terminals to make sure that the capacitor is discharged

Last Answer : Answer: D

Electrical circuits are protected against overheating by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Description : Electrical circuits are protected against overheating by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Last Answer : Answer: A

How do you eliminate radio frequency variation of an oscillator transmitter caused by its supply voltage? A. Use new power supply B. Lossen power supply shielding C. Use of regulated power supply D. Use of high capacitor in the supply circuit

Description : How do you eliminate radio frequency variation of an oscillator transmitter caused by its supply voltage? A. Use new power supply B. Lossen power supply shielding C. Use of regulated power supply D. Use of high capacitor in the supply circuit

Last Answer : C. Use of regulated power supply

_______is not as fast as SRAM but is cheaper and is used for main memory. Each bit uses a single capacitor and single transistor circuit.: a) DRAM b) SDRAM c) Both of Above d) None of These

Description : _______is not as fast as SRAM but is cheaper and is used for main memory. Each bit uses a single capacitor and single transistor circuit.: a) DRAM b) SDRAM c) Both of Above d) None of These

Last Answer : a) DRAM

What is the term for the number of times per second that tank circuit energy is either stored in the inductor or capacitor?

Description : What is the term for the number of times per second that tank circuit energy is either stored in the inductor or capacitor?

Last Answer : Natural frequency or resonant frequency (f r).

When the capacitor is completely discharged, where is the energy of the tank circuit stored?

Description : When the capacitor is completely discharged, where is the energy of the tank circuit stored?

Last Answer : Inductor magnetic field

In an a.c. circuit that contains both an inductor and a capacitor, what term is used for the difference between the individual reactances?

Description : In an a.c. circuit that contains both an inductor and a capacitor, what term is used for the difference between the individual reactances?

Last Answer : Resultant reactance.

What determines the rate of discharge of the capacitor in a filter circuit?

Description : What determines the rate of discharge of the capacitor in a filter circuit?

Last Answer : Value of capacitance and load resistance.

. What determines the rate of discharge of the capacitor in a filter circuit?

Description : . What determines the rate of discharge of the capacitor in a filter circuit?

Last Answer : Value of capacitance and load resistance

In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?

Description : In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?

Last Answer : rkg, the cathode to grid resistance.

A circuit is to be designed in which a capacitor must charge to 40 percent of the maximum charging voltage in 200 microseconds. The resistor to be used has a resistance of 40,000 ohms. What size capacitor must be used?

Description : A circuit is to be designed in which a capacitor must charge to 40 percent of the maximum charging voltage in 200 microseconds. The resistor to be used has a resistance of 40,000 ohms. What size capacitor must be used?

Last Answer : 0.1 microfarads 40% from the graph = 0.5

What is the RC time constant of a series RC circuit that contains a 12-megohm resistor and a 12-microfarad capacitor?

Description : What is the RC time constant of a series RC circuit that contains a 12-megohm resistor and a 12-microfarad capacitor?

Last Answer : 144 seconds (t=R x C)

What is the voltage drop across the resistor in an RC charging circuit when the charge on the capacitor is equal to the battery voltage?

Description : What is the voltage drop across the resistor in an RC charging circuit when the charge on the capacitor is equal to the battery voltage?

Last Answer : Zero.

At what instant does the greatest voltage appear across the resistor in a series RC circuit when the capacitor is charging?

Description : At what instant does the greatest voltage appear across the resistor in a series RC circuit when the capacitor is charging?

Last Answer : At the instant of the initiation of the action.

state what happens to the electrons in a capacitor circuit when (a) the capacitor is charging and (b) the capacitor is discharging.

Description : state what happens to the electrons in a capacitor circuit when (a) the capacitor is charging and (b) the capacitor is discharging.

Last Answer : a. When the capacitor is charging, electrons accumulate on the negative plate and leave the positive plate until the charge on the capacitor is equal to the battery voltage. b. When the ... the negatively charged plate to the positively charged plate until the charge on each plate is neutral.