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Why do non linear loads cause harmonics?

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Description : What is the difference between linear and nonlinear electrical loads?

Description : What is a non linear load?

Description : If non-linear loads are connected to the power system, then (A) displacement power factor is same as the total power factor (B) displacement power factor is not equal to the total power ... factor is due to harmonic currents (D) total power factor is due to fundamental component of current

Answer : If non-linear loads are connected to the power system, then displacement power factor is not equal to the total power factor

Description : Why harmonics are generated in electrical system?

Description : What is mitigation of harmonics?

Description : What is current harmonics?

Description : What are even and odd harmonics?

Description : What are the main causes of harmonics?

Answer : Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter

Description : What is the cause of voltage fluctuation?

Description : What is the cause of a brownout?

Description : What can cause a short circuit?

Description : What can cause a voltage spike?

Description : What would cause a power surge in a house?

Answer : If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip  

Description : Define armature reaction in an alternator. Explain the effect of armature reaction at various P.F. of loads of alternator.

Answer : Armature Reaction: The effect of armature flux on main flux is called as armature reaction.  Armature Reaction at Various Power Factors: When armature is loaded, the armature flux modifies ... lagging p.f. For capacitive loads the effect of flux is partly distorting and partly strengthening.

Description : The efficiency of a transformer, under heavy loads, is comparatively low because?

Answer : The efficiency of a transformer, under heavy loads, is comparatively low because copper loss becomes high in proportion to the output.

Description : Linear and non-linear device

Answer : Linear and non-linear device

Description : Explain the effect of Harmonics on the Transformer.

Answer : Effect of Harmonics on the Transformer:  1. Core loss: Harmonic voltage increases the hysteresis and eddy current losses in the lamination. The amount of the core loss depends on ... small core vibrations.  5. Saturation problem: Sometimes additional harmonic voltage causes core saturation.

Description : Slot harmonics are reduced in induction motors by using (A) fractional-pitch windings (B) fractional-slot windings (C) integral-slot windings (D) distributed windings

Answer : Slot harmonics are reduced in induction motors by using fractional-slot windings

Answer : The main reason for generation of harmonics in a transformer could be saturation of core.

Answer : Harmonics in transformer result in increased core losses, increased I2R losses, and magnetic interference with communication circuits.

Description : State the need for reduction of harmonics in inverters. Enlist the various methods for reduction of harmonics in inverter output.

Description : What do you mean by linear convolution?

Description : What can cause high amperage on a motor?

Answer : High  amperage  can  result  in  a motor  when the  amount  of  load  increases. when  load  increases  , it  reduces  the  rotor  speed which  increases  the  slip  at  constant  synchronous  speed ... ,  as  a  result  more  current  shall  have  been  drawn  to  maintain  the  additional  load.

Description : Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has

Answer : Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has less bandwidth

Description : Measurement of a non -electrical quantity involves the following four subsystems:  a) amplifier block b) display block c) instrumentation block d) transducer block  The correct, sequence in which these block occur is  (1) d,a,c,b (2) d, c, a, b (3) a, c, b, d (4) a, b, c, d

Answer : Measurement of a non -electrical quantity involves the following four subsystems:  a) amplifier block b) display block c) instrumentation block d) transducer block  The correct, sequence in which these block occur is d,a,c,b

Answer : Yes, Induction heating is used for both magnetic and non-magnetic materials.

Description : A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Answer : Solution

Description : What are ‘Linear actuators’ ? State applications.

Answer : What are ‘Linear actuators’ ? State applications.

Description : Linear algebra problem: Rank of a matrix

Answer : Linear algebra problem: Rank of a matrix https://youtu.be/b7tPLA3_y6Y

Description : Linear algebra problem: The determinant of the matrix

Answer : Answer : Linear algebra problem: The determinant of the matrix

Description : Linear Algebra Problem the solution to the system of equations

Answer : Linear Algebra Problem the solution to the system of equations https://youtu.be/y_FlupirxZM

Description : Linear Algebra Problem 2

Answer : https://youtu.be/zAPDYO0q-9w Linear Algebra Problem 2

Description : Linear Algebra Problem The product of eigen values of the matrix

Answer : Linear Algebra Problem The product of eigen values of the matrix https://youtu.be/JGcynUZFQ78

Description : A system is linear if and only if it satisfies

Answer : A system is linear if and only if it satisfies principle of superposition and principle of homogeneity

Description : A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will

Answer : A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will not change

Description : Which of the following converts linear displacement from a mechanical reference into a proportional electrical signal containing phase and amplitude information? A) CRO B) LVDT C) RVDT D) None of these

Answer : Which of the following converts linear displacement from a mechanical reference into a proportional electrical signal containing phase and amplitude information? A) CRO B) LVDT C) RVDT D) None of these

Description : The power flow problem mathematical model for a linear transmission network (A) is non-linear (B) is linear (C) considers time variation of generation (D) does not consider tap-changing transformers

Answer : The power flow problem mathematical model for a linear transmission network is non-linear

Description : Is a convolution linear?

Description : What are the disadvantages of the linear regulator? how are they overcome in the switching regulator? What is continuous and discontinuous mode switching regulator?

Answer : Disadvantages of the linear regulator: Linear regulator waste power in the form of heat. Linear regulator has very low efficiency. Linear regulator cannot be used for the step ... between continuous mode and discontinuous mode switching regulator.

Description : write short notes on Linear motor.

Answer : Normal electrical motor produces rotatory motion same the linear motor produces linear motion. Linear motors have low efficiency. Linear motor can directly produce straight line motion linear motor do not required gears or crank shaft to produce linear motion.

Description : Linear Time Invariant (LTI) System

Answer : Linear Time Invariant System Linear system means a system which possesses the property of superposition. Time invariant system means its behavior and characteristics are fixed over time. Before ... from the impulse response. Impulse response is related to frequency response via Fourier transform.

Description : what is linear regulator?

Answer : linear regulator video

Description : 2000 The rank of matrix is

Answer : .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 : Why do we need to correct power factor?

Description : Why do dimmable LED lights flicker?

Description : The three non -inductive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly (a) 11 A (b) 14 A (c) 17 A (d) 21 A

Answer : The three non -inductive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly 11 A

Description : Even small noises cause the pupils of the eyes to dilate. It is believed that this is why surgeons, watchmakers and others who perform delicate manual operations are so bothered by uninvited noise. The ... their pupils to change focus and blur their vision, making it harder to do their job well.

Description : Compare: 1. Active and passive network 2. Linear and non-linear network

Answer : 1. Active network and passive network. Sr.No Active network Passive network 1 If a network consists of an energy source, then it is called as an active network. If ... only to the linear networks.  The superposition theorem also is not applicable to the nonlinear networks.

Description : Write the specifications of linear and non- linear potentiometers. State its applications

Answer : Specifications of linear & nonlinear potentiometers:  1. Ohmic range: 10Ω to 125 kΩ 2. Power rating : 100watt to 200 watt 3. Tolerance :  2% 4. Voltage Rating: 5V-500V 5. Operating ... 7. Used as potential dividers. 8. It is used for panel control in receivers, function generator etc 

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