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Answer :

The phenomenon of ionization of surrounding air around the conductor due to which luminous glow with hissing noise is rise is known as the corona effect.

Related questions

Description : Factors affecting corona

Last Answer : The Following Factors affecting corona:-  1. Magnitude of Voltage : If voltage across two conductors is greater than 30 KV/cm, i.e. breakdown voltage of air than corona formation starts. ... of conductor e.g./ using ACSR, bundled conductor 3. By using smooth body conductor and hardware. 

Last Answer : Corona is nothing but the ionization of surrounding air around the conductor which produces hissing noise,

Description : Which type of corona generates much less ozone? A) A positive corona  B) A negative corona C) Both positive corona and negative corona generate same amount of ozone D) No ozone is generated by either type of corona

Last Answer : Which type of corona generates much less ozone? A) A positive corona  B) A negative corona C) Both positive corona and negative corona generate same amount of ozone D) No ozone is generated by either type of corona

Description : Corona loss in transmission lines can be reduced by (A) using small diameter conductors (B) using bundled conductors (C) using less spacing between conductors (D) increasing the transmission line voltage

Last Answer : Corona loss in transmission lines can be reduced by using bundled conductors

Description : Under Following conditions Ferranti effect occurs: 

Last Answer : Under Following conditions Ferranti effect occurs:  1. When there is no load on transmission line (IL = 0) 2. When There is no load at receiving sub-station or Lightly loaded 3. When ... VR) is found to be greater than sending end voltage (VS). This phenomenon is known as Ferranti effect.

Description : Explain in brief ‘Hall effect sensor’. 

Last Answer : Working: * Working principle of a Hall effect sensor is that if strip of conducting material carries a current in presence of transverse magnetic field as shown fig . * The difference of ... with Hall strip. * When a transverse magnetic field passes through the strip, the voltage difference 

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Description : What is piezoelectric effect? Name two piezoelectric material.

Last Answer : piezoelectric effect: Piezoelectric effect can be stated as follows: when a pressure or force or vibration is applied to crystalline material like quartz crystal or crystalline substances, then ... crystal: Quartz crystal ,Rochelle salt 2) Synthetic crystals : Barium Titanate, Lithium sulphate

Description : Explain magnetic effect employed in measuring instrument.

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Description : Ferranti Effect is more pronounced when ___________ A) the line is longer and the voltage applied is higher B) the line is shorter and the voltage applied is lower C) the line is shorter and the voltage applied is higher D) none of these

Last Answer : Ferranti Effect is more pronounced when the line is longer and the voltage applied is higher

Description : Skin effect is absent in which of the following transmission systems? A) Extra High Voltage (EHV) AC B) High Voltage Direct Current (HVDC) C) Both A and B D) None of these

Last Answer : Skin effect is absent in which of the following transmission systems? A) Extra High Voltage (EHV) AC B) High Voltage Direct Current (HVDC) C) Both A and B D) None of these

Description : Skin effect occurs when a conductor carries current at_____ frequencies.

Last Answer : Skin effect occurs when a conductor carries current at high frequencies.

Description : what is skin effect?

Last Answer : Skin effect is occurs in conductor due to high frequency...as the frequency increases the resistance of conductor increases...skin effect means the current flow through the skin of conductor....as the ... dc current their will be no skin effect...I hope you understand basic concept of skin effect

Description : what is Ferranti effect?

Last Answer : Ferranti effect is the increase in voltage at receiving end than sending end means sending end voltage is less than receiving end . It is occurs in long transmission line when the line is lightly loaded or at no load.

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Last Answer : The picture is hidden behind a login form, could you put it on, say, imageshack.us?

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Description : Piezo-electric effect

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Description :  State the disadvantages of skin effect.

Last Answer : Disadvantages of skin effect:- 1. Full cross section of conductor is not utilized, Therefore effective area of conductor reduces so its resistance increases. 2. Due to increase in resistance, copper ... increases (Since Voltage drop = IR ) 5. So voltage regulation becomes poor (increases) 

Description : State the meaning of ferranti effect and proximity effect.  

Last Answer : i) Ferranti effect : When long distance transmission is lightly loaded or there is no load condition than it is observe that receiving end voltage (VR) is found to be greater than sending end ... on conductor causes current in each conductor is re-distributed. This is known as proximity effect.

Description : State the meaning of skin effect and how can it be minimised. 

Last Answer : Meaning of skin effect :  When alternating current flows through conductor it has tendency to flow away from center of conductor. i.e. maximum current density is near skin of conductor and goes on ... whenever possible as Skin effect is absent (Since frequency 0) instead of A.C. supply.  

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

Last 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 : List out factors affecting proximity effect. 

Last Answer : Factors affecting proximity effect: 1. Conductor size (diameter of conductor) 2. Frequency of supply current. 3. Distance between conductors. 4. Permeability of conductor material 

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Description : With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

Last Answer : Working of N channel FET: * When a voltage is applied between the drain and source with a DC supply (VDD), the electrons flows from source to drain through narrow channel ... where the channel gets completely blocked and the drain current becomes zero is called pinch- off voltage. 

Description : When does the Body bias effect occur in an n-channel MOSFET?  A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) When the Drain voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage 

Last Answer : When does the Body bias effect occur in an n-channel MOSFET?  A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) ... voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage 

Description : The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get decreased B) Both distortion and bandwidth get increased C) Distortion is reduced and bandwidth is increased D) Distortion is increased and bandwidth is decreased 

Last Answer : The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased

Description : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the _______ of conductor.  (1) Surface (2) Center (3) Complete cross section area (4) Axis

Last Answer : The skin effect in conductors is due to non uniform distribution of current in it and major portion of current is near the Surface of conductor. 

Description : The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

Last Answer : The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

Description : The effect of a finite gain of an operational amplifier used in an integrator is that (A) it would not integrate (B) the slope of the output will vary with time (C) the final value of the output voltage will reduce (D) there will be instability in the circuit

Last Answer : The effect of a finite gain of an operational amplifier used in an integrator is that there will be instability in the circuit

Last Answer : The chemical effect of current is used in D.C. ammeter hour meter.

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Last Answer : Diversity factor has direct effect on the fixed cost of unit generated.

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Description : when the skin effect occurs ?

Last Answer : skin effect is occur at higher frequencies when skin depth is smaller

Description :  Which one of the following does not have an effect on corona ?  (a) Spacing between conductors (b) Conductor size (c) Line voltage (d) Length of conductor

Last Answer :  Which one of the following does not have an effect on corona ?  (a) Spacing between conductors (b) Conductor size (c) Line voltage (d) Length of conductor

Description : What effect did Corona have on Real Madrid ?

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Description : How can we reduce the effect of corona?

Last Answer : 1. By increasing conductor size: By increasing conductor size, the voltage at which corona occurs is raised and hence corona effects are considerably reduced. 2. By increasing conductor spacing: ... , the voltage at which corona occurs is raised and hence corona effects can be eliminated.

Description : Solid type cables are considered unreliable beyond 66 kV because (a) insulation may melt due to higher temperature (b) skin effect dominates on the conductor (c) of corona loss between conductor and sheath material (d) there is a danger of breakdown of insulation due to the presence of voids

Last Answer : (d) there is a danger of breakdown of insulation due to the presence of voids

Description : The effect of corona can be detected by (a) presence of ozone detected by odour (b) hissing sound (c) faint luminous glow of bluish colour (d) all of the above

Last Answer : (d) all of the above

Description : If the spacing between the conductors increases, the corona effect

Last Answer : If the spacing between the conductors increases, the corona effect Decreases

Description : The corona loss of a 3-phase transmission line is 100 kW at 60 kV/phase and 25 kW at 50 kV/phase. The disruptive critical voltage is (A) 40 kV (B) 43.6 kV (C) 49.6 kV (D) 50 kV

Last Answer : The corona loss of a 3-phase transmission line is 100 kW at 60 kV/phase and 25 kW at 50 kV/phase. The disruptive critical voltage is 40 kV

Description : Consider the following statements regarding corona :  1. It causes radio interference.  2. It attenuates lightning surges.  3. It causes power loss.  4. It is more prevalent in the middle conductor of a transmission line employing ... only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 3 and 4 only

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Last Answer : My state has multiple sites for FREE testing! Where are you ?

Description : Was the Corona epidemic good for the climate?

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Description : With the 20/21 flu season nearly eradicated, what currently employed anti-corona measures would you support as mandatory during future flu seasons?

Last Answer : I would not mind if they made mask wearing mandatory for the entire flu season. Along with that, they should keep up the cleaning in all businesses like wiping down grocery carts every time they come in.

Description : What is corona? Give examples. -Biology

Last Answer : answer:

Description : how fat are you and you will die in 23/04/2021 by corona because you have dibities?

Last Answer : youw david or shela or alex or morgan or lusy or hamid or isa or muhamed or mustafa or dany..... are you turcish