Define filter and state it’s types.

1 Answer

Answer :

A filter circuit may be defined as a circuit, which removes (or minimizes)the unwanted a.c. component of the rectifier output and allows only the d.c. component to reach the load.

Types of filters

1) Capacitor input filter(Shunt capacitor filter)

2) Choke input filter(series inductor filter)

3) LC filter

4) π Filter

5) RC filter

Related questions

Description : Explain the operation of a full wave bridge rectifier with π filter using a neat diagram. Draw input and output waveforms.

Last Answer : During positive half-cycle of input, the secondary voltage VAB is positive, so diodes D1 and D2 forward biased and D3 and D4 reverse biased. The load current flows from terminal A ... smooth DC voltage appears across the load. The input and output waveforms are shown in the figure.

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 : Define FHP motor and list various types.

Last Answer : Any motor rated less than one horse power may be called as fractional horse power motors(FHP) various types of FHP motors are: 1.Split phase induction motor 2. Capacitor start induction motor 3. Capacitor start capacitor run induction motor 4. Shaded pole induction motor. 

Description : Define EMF and state its unit.

Last Answer : Electromotive force(EMF): A potential difference generated by a source of electrical energy across its terminals which tends to produce an electric current in a circuit is called electromotive force. Unit of EMF is Volt

Description : State the need for filters and list the different types of filters.

Last Answer : Need for filters 1) Output of all rectifiers is pulsating dc voltage and most of citcuits which work on dc requires pure dc voltage. 2) So in order to get pure dc waveform, filters are connected at the ... 2) Choke input filter(series inductor filter) 3) LC filter 4) π Filter 5) RC filter

Description : State the types of single phase induction motors.

Last Answer : The types of single phase induction motors are: i) Resistance split phase induction motor. ii) Capacitor split phase inductor motor. a. Capacitor start induction run motor b. permanent capacitor motor c. capacitor start capacitor run induction motor iii) Shaded pole induction motor.

Description : Define transformation ratio of a transformer.

Last Answer : Transformation Ratio (K) of a transformer: It is the ratio of secondary number of turns to primary number of turns. (OR) It is the ratio of secondary voltage to primary voltage. (OR ) It is the ratio of primary current to secondary current. OR

Description : Define (i) Permeability (ii) Reluctance.

Last Answer : Permeability: The capability of the magnetic material to conduct the magnetic flux is known as permeability (OR) It is defined as ratio of magnetic flux density B in a medium to the magnetic flux intensity ... as the property of a material due to which it opposes the creation of magnetic flux in it.

Description : Define passive components and classify them.

Last Answer : Passive components: The components which by themselves are not capable of amplifying (or processing) electrical signals are known as passive components. They require external energy source for their functioning. These are bidirectional devices.  Classification: Resistors, Capacitors, Inductors etc.

Description : Define: (i) Efficiency (ii) Voltage regulation of transformer.

Last Answer : i) Efficiency : It is the ratio of output power to the input power of the transformer.It is denoted by η. ii) Voltage Regulation of transformer: The ratio of the change in Secondary Terminal ... So where, VNL = No Load Secondary voltage VFL = Full load secondary voltage

Description : Define: (i) Inductive reactance (ii) Impedance.

Last Answer : i) Inductive reactance: Inductive reactance is the opposition offered by an inductor to alternating current . It is denoted by XL and given by XL = 2πf LΩ = ωL Ω ii)Impedance: It is the total opposition offered to flow of AC current in an AC circuit. It is denoted by Z and the unit is ohm. 

Description : Define: (i) Electromagnetism (ii) Magnetic flux.

Last Answer : i)Electromagnetism : It is the magnetism generated by electricity. OR  It is defined as the phenomenon associated with electric and magnetic fields and their interactions with each other. ii) Magnetic flux : The total number of magnetic lines of force in a magnetic field is called magnetic flux.

Description : List different types of resistors and capacitors.

Last Answer : Types of Resistors: 1. Carbon Composition resistor 2. Thin film resistor 3. Thick film resistor 4. Wire wound resistor 5. Thermistor 6. LDR 7. Photo resistor Types of capacitors: 1 ... capacitor 2. Variable capacitor 3. Air ganged capacitor 4. PVC ganged capacitor 5. Trimmer capacitor

Description : List the types of induced emf.

Last Answer : The types of induced emf are : i) Statically induced emf , ii) Dynamically induced emf

Description : State the applications of BJT.

Last Answer : Applications of BJT: 1. As a switch 2. As an amplifier 3. As a multivibrator 4. As a oscillator 5. As a timer circuit 6. As a Logic circuits 7. Delay circuits

Description : Explain the working of auto-transformer and state any two advantages of it. 

Last Answer : Working of auto transformer :-It is a transformer with one winding only, part of this being common to both primary and secondary. In this transformer the primary and secondary are not electrically ... are less, so the efficiency of auto transformer is higher than that of two winding transformer.

Description : State why transistor is called as a bipolar device.

Last Answer : In case of transistor (BJT), the current conduction takes place due to both electrons and holes, ie, due to both positive as well as negative polarity charge carriers. Therefore transistor is called a bipolar device. 

Description : State Faraday's first and second law of electromagnetic induction.

Last Answer : i)Faraday's First Law: Whenever a conductor cuts the magnetic lines of force or is cut by the magnetic lines of force or flux linking with conductor changes, an emf is induced in the conductor.  ... Law: The magnitude of induced emf is directly proportional to the rate of change of flux.

Description : State the working principle of I ø transformer.

Last Answer : Working principle of transformer : Transformer works on the principle of mutual electromagnetic induction. When AC voltage is applied to the primary winding of a transformer it causes ac current to flow ... in the secondary winding. The current flows in the secondary circuit if load is connected.

Description : Explain the operation of transistor as a switch and as an amplifier, with neat circuit diagrams. 

Last Answer : Explanation of transistor as a switch: The transistor can be used for two types of application viz. amplification and switching. For the amplification, transistor is biased in its active region. ... results in a large output voltage, which shows that the transistor works as an amplifier.

Description : List any 4 advantages and any 4 disadvantages of Integrated circuits.

Last Answer : Advantages of Integrated circuits:- 1. Extremely small size. 2. Very small weight . 3. Very low cost . 4. More reliable . 5. Lower power consumption . 6. Easy replacement ... achieved.  9.Large value of saturation resistance of transistors. 10.Voltage dependence of resistor and capacitors.

Description : Draw the output characteristics of BJT in CE configuration and label various regions on it.

Last Answer :  output characteristics of BJT in CE configuration 

Description : Draw the block diagram of regulated power supply.

Last Answer : Block diagram of regulated power supply:

Description : Explain statically induced EMF and Dynamically induced EMF with neat diagrams.

Last Answer : Statically Induced EMF:- When changing magnetic field links with a stationary coil an emf is induced. This emf is called statically induced emf. Statically induced EMF is of two types: Self-induced ... cuts the field and an emf is induced. This emf is called dynamically induced emf.    

Description : Write the relation between RMS value and Average value.

Last Answer : The ratio of RMS value to average value is called the form factor of an alternating quantity.

Description : Draw: (i) Input characteristics of transistor in CE mode. (ii) Output characteristics of transistor in CE mode and show different regions on it.

Last Answer : (i) Input characteristics of transistor in CE mode.   (ii) Output characteristics of transistor in CE mode and show different regions on it.  

Description : Explain ideal voltage source with suitable diagram.

Last Answer : A voltage source is a two terminal device which can maintain a fixed voltage. An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current. ... the terminal voltage remains constant equal to V volts without load (RL = ∞) or with load

Description : List the different transistor configurations.

Last Answer : The three different transistor configurations are, 1. Common emitter configuration(CE) 2. Common base configuration(CB) 3. Common collector configuration(CC)

Description : List any two applications of LED.

Last Answer : 1) LEDs are used in 7 segment display and dot matrix display. 2) They are used in opto couplers. 3) They are used for indicating power ON/OFF conditions. 4) They are used in infrared remote controls. 5) They are used as indicators in various electronic circuits.

Description : Compare analog and digital ICs.

Last Answer : Sr. No. Analog ICs Digital ICs  1 Analog ICs accept and output analog data through its pins. Digital ICs deal with only logic data inputs and outputs.  2 Almost every ... IC for dedicated application. Works with TTL logic level and works in voltage range of 0-5V only.

Description : Compare autotransformer with two winding transformer.

Last Answer : Two winding transformer Auto transformer 1.It has two separate windings : a) primary, b)secondary.  1. An auto transformer has single winding which acts both as primary and secondary ... varied. 3. They find application as boosters in AC feeders to increase the voltage levels.

Description : Write emf equation of a transformer.

Last Answer : E.M.F equation of transformer is given by where Фm= Maximum value of ac flux linking with primary and secondary winding. f = frequency of applied ac signal N= number of turns on primary or ... in primary = E1=4.44 Фm f N1volts  Voltage induced in primary = E2=4.44 Фm f N2volts

Description : With the help of waveforms and phasor diagrams, show the phase relationship between voltage and current in pure inductive circuit.

Last Answer : Phasor Diagram:  

Description : Define filter. State its types. Draw any one filter with input and output waveform.

Last Answer : Defination : Filter is a circuit which remove or filtered out the AC component (ripple) Types of filter 1. Shunt Capacitor filter (C filter) 2. Series Inductor filter (L filter) 3. LC filter 4. filter (CLC filter) Shunt Capacitor filter (C filter) OR Waveforms:

Description : 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.

Description : Define High pass filter.

Last Answer : A low pass filter allows only high frequency signals upto a certain break point fH to pass through

Description : Define low pass filter.

Last Answer : A low pass filter allows only low frequency signals upto a certain break point fH to pass through.

Description : Define Bandpass filter.

Last Answer : The bandpass filter is the combination of high and low pass filters, and this allows a specified range of frequencies to pass through.

Description : Define ‘slurry’ and ‘filter cake’.

Last Answer : i) Slurry: Mixture of insoluble substances suspended in a liquid and intended to filter before use.   ii) Filter cake: The solid which gets collected on the filter is called as filter cake.

Description : Define The term Clarification. Write the working of filter candle with neat diagram.

Last Answer : Clarification:-  When solids are present in a very small proportion i.e. not exceeding 1.0 % the process of its separation from liquid, is called clarification. Working :-   1) These are ... the candle & gets collected inside the candle from where it is removed. Diagram :

Description : Define roll of rate and order of filter.

Last Answer : 1. Roll of rate is the rate of change of gain with frequency. Roll of rate is always measured in dB/decade. 2. The roll of rate is called the order of the filter. It depends on the rate at which filter ... rate is -40 dB / decade or +40 db / decade then the filter is of 2nd order and so on

Description : Water Filter Types and Why to Buy Them?

Last Answer : A water filter is something that's is necessary in our modern world. With that much pollution around us.Clean water = healthy lifeI recommend you guys the link below if you are interested in some ... link below if you are interested in some water filters product with good deals://cutt.ly/ekqsNKW

Description : What types of jacuzzi filter cartridges are there?

Last Answer : There are three types of filters - Diatomaceous Earth Filters, Sand Filters, and Cartridge Filters.

Description : What are the types of filter circuits?

Last Answer : The types of filter circuits are Inductor filter Capacitor filter LC filter CLC or π filter

Description : What is meant by filter? What are the different types of filters?

Last Answer : Ans-Filters are the components of a circuit which remove distortion or ripples.Types of filters : 1. High pass filters 2. Low pass filters 3. Band pass filters