# when capacitor act as open circuit?

when capacitor act as open circuit?

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

## Related questions

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

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

Description : A circuit is connected as shown in the figure with the switch S open. When the switch is closed, the total amount of charge that flows from Y to X is

Description : A single-phase transformer has no-load loss of 64 W, as obtained from an open circuit test. When a short-circuit test is performed on it with 90% of the rated currents flowing in its both LV and HV windings, ... .0% of the rated current (C) 80.0% of the rated current (D) 88.8% of the rated current

Answer : A single-phase transformer has no-load loss of 64 W, as obtained from an open circuit test. When a short-circuit test is performed on it with 90% of the rated currents flowing in its both ... measured loss is 81 W. The transformer has maximum efficiency when operated at 80.0% of the rated current

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

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.

Description : What is the role of a capacitor in a circuit?

Answer : BJT act as switch in saturation and  cutoff region ( ON state in saturation region and OFF state in cut-off region )

Answer : Active region of BJT act as amplifier.

Description : What happens to current flow in a capacitive circuit when the DC voltage across the capacitor is approximately equal to the source voltage?

Answer : Capacitor always charges up to the voltage of source. When the capacitor is charged to same as source voltage then there is no current flowing through the capacitor. The current through the capacitor is called displacement current.

Description : When an alternating potential is applied to a capacitor, the current in the circuit will  1. lead the applied potential 2. lag the applied potential 3. be in phase with the applied potential 4. none

Answer : When an alternating potential is applied to a capacitor, the current in the circuit will lead the applied potential

Description : What is the direction of flow when charging a capacitor?

Description : How do you know when a capacitor is bad?

Description : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping (A) N-side depletion region is small as compared to p-side depletion region (B) N-side ... depletion region (C) N-side depletion region is same as p-side depletion region (D) Cannot say

Answer : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping N-side depletion region is small as compared to p-side depletion region

Description : As per the Dowry Prohibition Act 1961, when any person is prosecuted for taking or abetting the taking of dowry then the burden of proving that he/she has not committed the offence lies with ... prosecuted b) the person who is being prosecuted c) the local councillor d) the marriage registrar

Answer : b) the person who is being prosecuted

Description : We act as though comfort and luxury were the chief requirements of life, when all that we need to make us really happy is something to be enthusiastic about. - Charles Kingsley quote

Description : A quarter wave line open circuited at far end behaves as:  (1) Inductance (2) L and C in parallel (3) Capacitance (4) L and C in series

Answer : A quarter wave line open circuited at far end behaves as: L and C in series.

Description : As compared to a closed loop system an open loop system is  (a) more stable as well as more accurate (b) less stable as well as less accurate (c) more stable but less accurate (d) less stable but more accurate

Answer : If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then Electrolytic capacitor will, in all probability, suffer break down.

Description : The transient current in lossless L-C circuit when excited from an AC source is, sine wave  (a) Critically damped (b) Underdamped (c) Overdamped (d) Undamped

Answer : The transient current in lossless L-C circuit when excited from an AC source is, sine wave Undamped

Description : In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR in another phase, results in (A) voltage notching (B) harmonic distortion (C) voltage sag (D) voltage swell

Answer : In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR in another phase, results in voltage notching

Description : The current in a circuit with resistance in 6 amp. When an additional resistance of 4 ohms is inserted the current drops to 4 amp. The original resistance in ohms is

Answer : The current in a circuit with resistance in 6 amp. When an additional resistance of 4 ohms is inserted the current drops to 4 amp. The original resistance in ohms is 8.

Description : Define Multivibrator. State the types of multivibrator. Which M/V can be used as a flip-flop? Draw the circuit diagram.

Answer : Definition:- A multivibrator is an electronic circuit that switches rapidly by means of positive feedback between two or more states.  OR  A multivibrator is an electronic circuit used to implement a ... Bistable Multivibrator: it can operate as a flip-flop, Circuit diagram

Description : The time constant of an RC circuit is defined as the time taken by the voltage across the capacitor to become_____ of its final value   (a) 63.2% (b) 36.8% (c) 50% (d) 100%

Answer : The time constant of an RC circuit is defined as the time taken by the voltage across the capacitor to become 63.2% of its final value

Description : Define (i) Open circuit (ii) Short circuit.

Answer : Open circuit : An electrical circuit is said to be open,when any part of conducting path is open or broken and there is no continuity in the conducting path of an electrical circuit. Short circuit : An electrical circuit is said to be short,when voltage source has closed path across its terminal.

Description : Explain with neat circuit, concept of open circuit and short circuit.

Answer : Open Circuit  Two points in a circuit are said to be open circuited if there is no circuit element or direct connection between them. An open circuit exist between points A and B in ... short circuited in below figure. The resistance between short circuited points is zero. RAB= 0Ω

Description : Describe the difference between an open circuit and a short circuit.

Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit

Description : The ratio of air-gap line voltage from open-circuit characteristic and armature current from short-circuit characteristic for a particular value of the field current in a synchronous ... reactance (B) synchronous impedance (C) unsaturated synchronous reactance (D) unsaturated synchronous impedance

Description : For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is: (1) 100 Ω (2) 50 Ω (3) 25 Ω (4) 10 Ω

Answer : For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is: 10 Ω

Description : A 100 kVA, 415 V(line), star-connected synchronous machine generates rated open circuit voltage of 415 V at a field current of 15 A. The short circuit armature current at a field current of 10 A is equal to the ... unit saturated synchronous reactance is  (A) 1.731 (B) 1.5 (C) 0.666 (D) 0.577

Answer : A 100 kVA, 415 V(line), star-connected synchronous machine generates rated open circuit voltage of 415 V at a field current of 15 A. The short circuit armature current at a field current of 10 A is equal to the rated armature current. The per unit saturated synchronous reactance is 1.731

Description : In an open circuit.....

Answer : In an open circuit Resistance is infinity and current is zero

Description : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W

Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W

Answer : Open circuit fault in a cable can be located by: Capacity test

Answer : It is required to measure the true open circuit e.m.f. of a battery. The best device is D.C. potentiometer.

Answer : A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be about 2 V.

Description : During open circuit test of a transformer?

Answer : During open circuit test of a transformer primary is supplied rated voltage.

Description : An open-circuit test on a transformer is conducted primarily to measure?

Answer : The open-circuit test in a transformer is used to measure

Description : Explain open emitter BJT drive circuit.

Answer : open emitter BJT drive circuit:

Answer : High Voltage side is open circuited.

Answer : Primary side is low voltage side and secondary side is high voltage side.

Description : Women's hearts beat faster than men's.The main reason for this is simply that on average women tend to be smaller than men and have less mass to pump blood to. But women's and men's ... heart attack, and many treatments that work for men must be adjusted or changed entirely to work for women.

Description : When your exercises his powers with an altitude of malice how would you avoid confrontation under this condition? Options: A) You become furious but crumble down your emotions due to the superiority ... him punishment for his untrue act D) You keep promise not to surrender against the wickedness

Answer : D) You keep promise not to surrender against the wickedness

Description : The act of writing new data into register (1) is possible only when the register is an accumulator (2) is possible only when the register is an accumulator or instruction register (3) erases the previous contents of the register (4) is non-destructive to existing contents

Answer :  is possible only when the register is an accumulator or instruction register

Description : When was the Minimum Wages Act enacted in India ? (1) 1936 (2) 1948 (3) 1951 (4) 1956

Description : How do you think you will be/act when you are old?

Description : For a two port network, with output shorted, V1=25V, I1=1 A,I2=2A. With input open circuited, V1=10 V,V2= 50 V,I2= 2 A. h12 and h21 are  A) 0.2 and 25 B) 25 and 0.2 C) 0.4 and 2 D) 0.2 and 2

Description : Draw the circuit diagram of shunt capacitor filter along with full wave rectifier. Draw the waveform of full wave rectifier output and shunt capacitor filter output.

Answer : Fig: Shunt capacitor filter along with full wave rectifier Fig: Waveform of full wave rectifier output and shunt capacitor filter output.

Description : With help of circuit diagram and waveform, explain shunt capacitor filter.

Answer : Circuit diagram and Waveform: OR Explanation: A filter circuit is one which removes the ac component present in the rectified output and allows the dc component to reach the ... which allows ac components. The remaining dc components present in the signal are collected at the output.

Description : A circuit which employs a DIRECT CURRENT source has a branch which contains a capacitor. After the circuit has reached a steady state, what is the magnitude of the current in the circuit branch which contains the capacitor?