In an LC choke-input filter, what prevents the rapid  
charging of the capacitor?

1 Answer

Answer :

The CEMF of the inductor

Related questions

Description : In an LC choke-input filter, what prevents the rapid charging of the capacitor?

Last Answer : Counter electro-motive force of the inductor.

Description : What are the two main disadvantages of an LC capacitor filter?

Last Answer : Cost and size of the inductor.

Description : . What are the two main disadvantages of an LC capacitor filter?

Last Answer : Cost of the inductor and size of the inductor.

Description : If the inductance of a choke-input filter is increased, will the output ripple voltage amplitude (Er) increase or decrease?

Last Answer : Decrease.

Description : Draw and describe circuit diagram of centre tapped rectifier with LC filter along with its input and output waveforms.

Last Answer : Explanation: A centre- tap full wave rectifier drive produces the rectified voltage and it drives the LC filter. We know that the series inductor filter is preferred for low values of load resistance ( ... load RL. The output voltage waveforms are similar to that as shown in figure above.  

Description : What is the value usually chosen for a filter choke?

Last Answer : 1 to 20 henries.

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

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.

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.

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.

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

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

Description : A capacitor in an LC oscillation has a maximum potential difference of 1.5 and a maximum energy `360muJ`. At a certain instant `t=t_(0)`, the potentia

Last Answer : A capacitor in an LC oscillation has a maximum potential difference of 1.5 and a maximum energy `360muJ`. ... is 5 volt D. The value of V is 10volt

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

Last Answer : Value of capacitance and load resistance.

Description : In a capacitor filter, is the capacitor in series or in parallel with the load?

Last Answer : Parallel.

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

Last Answer : Value of capacitance and load resistance

Description : In a capacitor filter, is the capacitor in series or parallel with the load?

Last Answer : Parallel.

Description : State any four advantages of LC filter.

Last Answer : 1. The choke input (LC) filter has a high output D.C voltage. 2. It has no loading effect on the rectifier and power transformer.  3. The diode does not have to carry surge currents.  ... effect on the rectifier and power transformer.  7. It has better voltage regulation than that of π filter.

Description : Compare RC and LC filter.

Last Answer : RC filters  LC filters The RC filter is only useful for small load currents. The LC filters are useful for heavy load currents. More power dissipated in RC filter. Less power ... RC is fine for filtering low power signals. LC is fine for filtering high power signals.

Description : Sketch circuit diagram of bridge rectifier with LC filter. State function of each component.

Last Answer :  Circuit diagram :  Components and its function: :  1. Transformer- An electrical device which transfers electrical energy from one electric circuit to other, without changing the frequency. The ... DC components.  4. Capacitor- It bypasses AC components if any and gives DC to load. 

Description : The ripple factor in an LC filter.   (A) Increases with the load current (B) Increases with the load resistance (C) Remains constant with the load current (D) Has the lowest value

Last Answer : The ripple factor in an LC filter. Has the lowest value

Description : The 'Choke' used with a tube light is basically – (1) an inductor (2) a capacitor (3) a transformer (4) a resistor

Last Answer : (1) an inductor Explanation: In electronics, a choke is an inductor used to block higher-frequency alternating current (AC) in an electrical circuit, while passing lower-frequency or direct ... created by suddenly interrupting the current in choke, which is connected in series with the tubelight.

Description : The ‘Choke’ used with a tube light is basically (1) an inductor (2) a capacitor (3) a transformer (4) a resistor

Last Answer : an inductor

Description : How many tuned parallel LC circuits are shown in this schematic?

Last Answer : Four.

Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Last Answer : Yes.

Description : When is line current minimum in a parallel-LC circuit?

Last Answer : At the resonant frequency.

Description : What is the reactance property at the input of a shorted quarter wavelength line? A. A parallel LC circuit B. A pure inductive reactance C. A series LC circuit D. A pure capacitive reactance

Last Answer : A. A parallel LC circuit

Description : Is better filtering achieved at a high frequency or at a low frequency at the input of the filter?

Last Answer : High

Description : If the impedance of the choke is increased, will the ripple amplitude increase or decrease?

Last Answer : Decrease.

Description : What is the range of values usually chosen for a choke?

Last Answer : To determine that all data can be processed correctly and that the output is correct.

Description : Which of the following conditions indicates a short circuited capacitor when checking its condition with an ohmmeter? A. The capacitor shows charging, but the final resistance reading is appreciably less ... moves quickly to the low resistance side of the scale, then slowly recedes toward infinity.

Last Answer : Answer: B

Description : Work done in charging a capacitor is given by A. (1⁄2)QV B. 2QV C. QV D. 2V

Last Answer : (1⁄2)QV

Description : Charging Action of capacitor

Last Answer : Charging Action of capacitor .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Description : Capacitor : Before charging takes place

Last Answer : Capacitor : Before charging takes place

Description : A 100 pF capacitor has a maximum charging current of 150 μA.What is the slew rate ? (A) 1.5 V/μs (B) 1.05 V/μs (C) 0.15mV/s (D) 10.5 mV/s

Last Answer : A 100 pF capacitor has a maximum charging current of 150 μA.What is the slew rate ? (A) 1.5 V/μs (B) 1.05 V/μs (C) 0.15mV/s (D) 10.5 mV/s

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

Description : Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m2 /hr. (A) 0.1 to 1 (B) 3 to 6 (C) 10 to 15 (D) 15 to 20

Last Answer : (B) 3 to 6

Description : Insufficient washing of sand grains in a rapid sand filter causes (A) Air binding (B) Shrinkage of filtering media (C) Mud balls (D) Expansion of filtering media

Last Answer : (C) Mud balls

Description : The maximum permitted loss of head in a rapid sand filter, is (A) 1 m (B) 2 m (C) 3 m (D) 4 m

Last Answer : (C) 3 m

Description : A high velocity of wash water is required for (A) Rapid gravity filter with strainers (B) Rapid gravity filter without strainers (C) Slow sand filter with strainers (D) Slow sand filter without strainers

Last Answer : (B) Rapid gravity filter without strainers

Description : Rapid sand filter (A) Should be preceded by coagulation and sedimentation (B) Uses rapid sand as filter media (C) Is used after slow sand filtering has been done (D) Can combine disinfection also

Last Answer : (A) Should be preceded by coagulation and sedimentation

Description : Rapid gravity filter can only remove turbidity of water upto (A) 15 to 25 gm/litre (B) 25 to 30 gm/litre (C) 30 to 35 cm/litre (D) 35 to 40 gm/litre

Last Answer : (D) 35 to 40 gm/litre

Description : The yield of a rapid gravity filter as compared to that of slow sand filter, is (A) 10 times (B) 15 times (C) 20 times (D) 30 times

Last Answer : (D) 30 times

Description : Distribution of wash water is provided in  (A) Sedimentation tank  (B) Slow sand filter  (C) Rapid gravity filter  (D) All the above 

Last Answer : (C) Rapid gravity filter

Description : a rapid gravity filter  (A) Raw water from the source is supplied  (B) Disinfected raw water is supplied  (C) Raw water passed through coagulation tank is supplied  (D) None of these

Last Answer : (C) Raw water passed through coagulation tank is supplied 

Description : In a rapid sand filter, air binding is caused due to excessive  (A) Negative pressure  (B) Pressure  (C) Turbidity  (D) Water pressure

Last Answer : (A) Negative pressure

Description : Which of the following operational problems relate to the functioning of rapid gravity filter ? 1. Inadequate media comprising filter bed 2. Sludge bulking 3. Mud balls 4. Negative head 5. Incrustation of media (a) 1, 3, 4 and 5 ... 2, 3 and 4 only (c) 2, 3, 4 and 5 only (d) 1, 2, 3, 4 and 5

Last Answer : (a) 1, 3, 4 and 5 only

Description : Consider the following statements. The role of the gravel bed in a rapid sand filter is : 1. To filter out large suspended matter 2. To support the sand bed above it 3. To prevent the escape of sand particles 4. To uniformly ... and 5 b) 2, 3 and 4 only c) 3, 4 and 5 only d) 1, 2 and 3 only

Last Answer : b) 2, 3 and 4 only

Description : Draw and explain: bridge rectifier with shunt capacitor filter.

Last Answer : Operation of bridge rectifier with capacitor filter is explained in different intervals with the help of the following wave form. Operation in interval at 0 to A: ... filter is very close to theideal dc voltage waveform as most of the ripple is removed from rectified output.

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.

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