# What is the harmonic filter?

What is the harmonic filter?

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It is being used to supress the input voltage distortion at input side of any electrical equipment. This distortion is created by other electrical loads like motor, drives etc nearby connected with same source. Harmonic filter to be designed for a range of harmonics or specific harmonics like 3rd harmonics  5th harmonics, 7th harmonics.

## Related Questions

The second harmonic distortion is defined as the A) Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency B) Harmonic distortion due to only second harmonic component C) Sum of distortion of first and second harmonic components in the output
Last Answer : The second harmonic distortion is defined as the Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency

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To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires :  (A) 12 SCRs (B) 18 SCRs (C) 36 SCRs (D) 72 SCRs
Last Answer : To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires : 36 SCRs

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Last Answer : The time period of third harmonic of power supply frequency, in milliseconds, is 6.66

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The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7
Last Answer : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is 6/7

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Explain the sinusoidal harmonic reduction techniques for cylcoconverters.
Last Answer : sinusoidal

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What is harmonic in power quality?

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What do you mean by active filter? State its advantages over passive filter . Define pass band & stop band with respect to filter.
Last Answer : Active Filter: Active Filter is formed by using active element along with the passive components.  Advantages of Active filter over Passive filter: High value of pass band gain can be obtained. It is ... pass band.  Stop Band Filter: The frequency range which is attenuated is known as stop band.

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Which capacitors are suitable for DC filter circuits?
Last Answer : Electrolytic capacitors are suitable for DC filter circuits.

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write short notes on Low-pass filter.
Last Answer : low-pass filter (1) filter exhibiting frequency selective characteristic that allows low-frequency components of an input signal to pass from filter input to output unattenuated all high-frequency components are ... the bandwidth of the filter. A filter whose impulse response is a low-pass signal.

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derive an expression for the Ripple factor in a full wave rectifier using inductor filter

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Describe the operation of inductor filter with help of circuit diagram and waveforms.

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Obtain the Ripple factor of a full wave rectifier with shunt capacitor filter.

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Draw the circuit diagram for CLC or Pi filter and state it's ripple factor.

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Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.

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Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.

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Oil Filter Wrench
Last Answer : They say that there's a tool for every job, and using anything else other than it is essentially running the risk of either botching up the job or being less efficient with it. For changing ... driver. When you turn the driver counterclockwise, the gears cause the prongs to clench the filter body.

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Oil Filter Ratings
Last Answer : When grading oil filters, three main criteria must be considered: single-pass efficiency, multiple-pass efficiency, and the micron rating for particle pass-through. Single-Pass Efficiency Single- ... using an ISO approved particle counting is used to determine the real efficiency of oil filters.

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Oil Filter Manufacturers
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Last Answer : For motorists and vehicle enthusiasts, getting replacement parts can pose a problem, especially if you live in a town where such parts are scarce. Sometimes, you'll have to use another part that looks like ... guide. It will save you trouble and money, and maybe, give you some knowledge on the side.

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Oil Filter Comparison
Last Answer : It is a common fact that not everything is created equal. In a particular category, one will always have an advantage over the another, whether it's by price, quality, or over-all performance. Even ... . Don't reply on the overall rating, but rather, focus on the characteristics that matter to you.

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Oil Filter Changing
Last Answer : It is recommended that you change your oil filter once every six months (or every 6000 miles, whichever of the two comes first). Failure to do so will have your engine run the risk of degradation and failure ... the filter mounts to the engine. Screw the new filter in place. Put in the new oil.

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How to Replace an Oil Filter
Last Answer : How to Replace an Oil Filter Oil changes may seem cheap, but if you calculate the cost of every oil change you've had at a gas station or a garage, you'll have big savings if you do it on your ... have to pay a few extra dollars for someone to perform a maintenance task that you can do on your own.

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How to Change a Furnace Filter ?
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need of rectifier and filter.
Last Answer : Need of rectifier: Every electronics circuit needs a D.C. power source for its operation. The rectifier circuit is used to convert A.C. supply to unidirectional pulses .  Need of filter: A filter ... only the D.C. components to reach the load. So filter is used to provide ripple free output.

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What is the function of an electrical filter ?
Last Answer : Filter separates different components that are mixed together. Electrical filter can separate different frequency components. Electrical filters are the electrical circuits which are use to remove unwanted frequency components from the signal.

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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.

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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.

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What is the convolution filter?

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Explain design constraint of filter inductor design.

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How do I forward emails from one sender to someone else in Gmail?
Last Answer : answer:In Gmail settings, click on the FILTERS tab and see how you can narrow it down to the ones you want to forward. Specifically you can filter on from / to / and words in the subject or body of the message.

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How would I do this in a video editing program, and which one do I need?
Last Answer : Is it for display on a Web page, or on some other media? What media?

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Can I cut charcoal filters to size?
Last Answer : Automiotive charcoal cansiters are filled with particles about 1mm across. Crack the case and they all fall out. Not sure what kind of filter you are talking about. There is a monolith type filter that looks ... . You can cut that shorter if you use a fine blade and don't care about smooth edges.

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Harmonic suppressor connected to an antenna. A. Low-pass filter B. High-pass filter C. M-derived filter D. Constant-K
Last Answer : A. Low-pass filter

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Harmonic suppressor connected to an antenna. A. High pass filter B. Low pass filter C. Tank circuit D. M-derived filter
Last Answer : B. Low pass filter

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___ has a series RC combination in one arm and a parallel RC combination in the adjoining arm and used as a notch filter in harmonic distortion analyzer.
Last Answer : wein bridge

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For a prototype low pass filter, the series and shunt elements are respectively _____.
Last Answer :  For a prototype low pass filter, the series and shunt elements are respectively inductive and capacitive.

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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

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The values of L and C for a low pass filter with cut off frequency of 2.5 KHz and operating with a terminated load resistance of 450 Ohm are given by  (a) 57.3 mH; 0.283 μF (b) 28.66 μH; 0.14 μF (c) 114.64 mH; 0.566 mF (d) 50.23 mH; 0.632 mF
Last Answer : The values of L and C for a low pass filter with cut off frequency of 2.5 KHz and operating with a terminated load resistance of 450 Ohm are given by 57.3 mH; 0.283 μF

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A band pass filter is that which
Last Answer : A band pass filter is that which passes signals between two frequency limits

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Low pass filter with cut off frequency of 100 kHz and high pass filter with cut off frequency of 50 kHz are connected in tandem, the resultant filter is Low pass filter with cut off frequency of 100 kHz ... kHz Band pass filter with pass band from 50 kHz to 100 kHz. None of the above.
Last Answer : Low pass filter with cut off frequency of 100 kHz and high pass filter with cut off frequency of 50 kHz are connected in tandem, the resultant filter is Band pass filter with pass band from 50 kHz to 100 kHz.

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Prior to sampling an anti-aliasing filter is used.
Last Answer : Prior to sampling an anti-aliasing filter is used. It is used to attenuate the high frequency component of the Signal

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Rectification efficiency of a full wave rectifier without filter is nearly equals to:  (1) 51% (2) 61% (3) 71% (4) 81%
Last Answer : Rectification efficiency of a fullwave rectifier without filter is nearly equals to: 81%

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A twin T network is a filter of kind  A) BEF B) LPF C) HPF D) BPF

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Maximum phase distortion is encountered when using the filter approximation  A) Elliptic B) Butterworth C) Chebyshev I D) Inverse Chebyshev

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Angles in degrees of pole locations of 4th order Butterworth low pass filter approximation from either real axis are  A) +45,-45,+30,-30 B) +67.5,-67.5,+45,-45 C) +30,-30,+22.5,-22.5 D) +67.5,-67.5,+22.5,-22.5

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What notes of the scale do you raise to get the harmonic and melodic minors?
Last Answer : answer:You are correct. There are three minor modes. natural minor, harmonic minor and melodic minor. Natural minor stays with the key signature of the relative major (e.g., A minor has the same ... F# and G# respectively, and revert back to the naturals when descending). (Edit for clarity)

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A particle in simple Harmonic Motion while passing through mean position will have a.Maximum kinetic energy and minimum potential energy b.Average kinetic energy and average potential energy c. ... energy d.Maximum kinetic energy and maximum e.Minimum kinetic energy and minimum potential energy
Last Answer : a. Maximum kinetic energy and minimum potential energy

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The periodic time of a body moving in Simple Harmonic Motion is a.Directly proportional to its angular velocity b.Directly proportional to the weight of the body c.Inversely proportional to ... d.Directly proportional to the momentum of swinging body e.Inversely proportional to the angular velocity
Last Answer : e. Inversely proportional to the angular velocity

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A body in Simple Harmonic Motion will attain maximum velocity when it passes through a.Point of 0.75 amplitude b.Extreme point of the oscillation of L.H.S. c.Point of half amplitude d.Extreme point of the oscillation at R.H.S. e.Mean position
Last Answer : e. Mean position