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Answer :

An ideal transformer is one which has no losses and magnetic leakage.

Related questions

Last Answer : An ideal transformer will have maximum efficiency at a load such that copper loss equal to iron loss.

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

Last 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 : The internal resistances of an ideal current source, and an ideal voltage source are, respectively, (A) 0, ∞ (B) ∞, ∞ (C) ∞, 0 (D) 0,0

Last Answer : The internal resistances of an ideal current source, and an ideal voltage source are, respectively, ∞, 0

Description : The gain of an ideal amplifier must be

Last Answer : The gain of an ideal amplifier must be infinity

Description : An ideal voltage source has?

Last Answer : An ideal voltage source has zero internal resistance.

Description : An ideal voltage source should have?

Last Answer : An ideal voltage source should have zero source resistance.

Last Answer : An ideal traction system should have easy speed control, high starting tractive effort, equipment capable of with standing large temporary loads.

Last Answer : For any type of consumer the ideal tariff is three part tariff.

Description : What should be the ideal resistance of ammeter ?

Last Answer : Ideal resistance of ammeter should be zero.

Description : What are the desirable characteristics of ideal switch?

Last Answer : Desirable characteristics of the ideal switch: It is desirable to have power switches characteristics closer to ideal switch. The ideal switch should have the following characteristics. Zero resistance when ... . 100% efficiency. Able to control power flow with zero power dissipation.

Description : what is ideal voltage source?

Last Answer : every voltage source have their own resistance that is called as internal resistance it is because of the resistance of electrodes and electrolytes in the battery interms of other supplyit have ... in universe it means ideal voltage source is this voltage source having internal resistance zero

Last Answer : An ideal transformer has infinite values of primary and secondary inductances. The statement is false.

Description : Explain the effect of Harmonics on the Transformer.

Last 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 : List two special feature of welding transformer.

Last Answer : Special features of welding transformer: i) It is a step down transformer that reduces the source voltage to a voltage desired according to the demands of the welding process. ii) Having large primary turns and less ... V ii) Secondary voltage - 40 to 60 V iii) Secondary current - 200 to 600 A

Description : State two applications of isolation transformer

Last Answer : Applications of isolation transformer: i) Isolates the load equipment from supply ground: ii) Reduction of voltage spikes iii) It acts as a decoupling device. iv) Protects loads from harmonic distortion.

Description : State why a transformer always have an efficiency of more than 90%.

Last Answer : As transformer is static device with no moving parts, the losses due to friction & windage are completely absent. Hence transformer has efficiency of more than 90%.

Description : Equivalent circuit of transformer

Last Answer : Equivalent Circuit Diagram of Transformer Referred to Primary: V1 -Primary Input voltage I1 - Input Current I0- Exciting current/ No load current Im- Magnetizing component ... equivalent of secondary terminal voltage ZL- Load impedance ZL ′- Primary equivalent of load impedance

Description : Single phase transformer

Last Answer : Single phase Transformer Transformer

Description : What is the use of transformer?

Last Answer : The use of transformer  is to do lower or raise  the voltage or currents in an electrical  circuit.  That's quite so simple. 

Description : Write about transformer on DC.

Last Answer : Transformer on DC : Transformer cannot work on DC. Transformer works on electromagnetic induction principle. Electromagnetic induction principle means when flux linking with coil changes and EMF induced in it ... winding insulation will burn. https://youtu.be/TVp_0fIfxqY

Description : State and justify which of the following two transformers is better:  Transformer A = 4% voltage regulation  Transformer B = 6% voltage regulation

Last Answer : Transformer A with 4% voltage regulation is better.  Justification: Voltage regulation refers to the percentage change in secondary voltage when load is changed from no-load to full-load with primary voltage ... 4% voltage regulation, which is less as compared to 6% of transformer B, it is better.

Description : State any four characteristics of core type transformer.

Last Answer : Characteristics of core type transformer: i) It has one window. ii) It has one magnetic circuit. iii) Core surrounds the winding. iv) Average length of core is more. v) Area of cross ... Better cooling for winding. vii) Mechnical strength is comparatively less. viii) Repair and maintenance is easy.

Description : Explain construction and working of single phase Auto transformer.

Last Answer : Construction of single phase auto transformer: (i) It has only one winding wound on a laminated circular magnetic core. (ii) The core is made of silicon steel stampings. (iii) The two terminals of the ... help of handle. 5) The same transformer can be used as step-up or step down auto-transformer

Last Answer : No-load current in a transformer lags behind the voltage by about 75°.

Last Answer : The purpose of providing an iron core in a transformer is to decrease the reluctance of the magnetic path.

Last Answer : In the transformer low voltage winding has got more cross-sectional area.

Last Answer : A transformer cannot raise or lower the voltage of a D.C. supply because Faraday's laws of electromagnetic induction are not valid since the rate of change of flux is zero.

Last Answer : Primary winding of a transformer could either be a low voltage or high voltage winding.

Last Answer : High voltage winding in a transformer has more number of turns.

Last Answer : The efficiency of a power transformer is of the order of 98 percent.

Last Answer : The no load current in a transformer lags behind the applied voltage by an angle of about 75°.

Last Answer : In a transformer, routine efficiency depends upon load current and power factor of load.

Last Answer : The maximum efficiency of a distribution transformer is at 50% full load.

Last Answer : Transformer breaths in when load on it decreases.

Last Answer : No-load current of a transformer has small magnitude and low power factor.

Last Answer : The purpose of providing iron core in a step-up transformer is to decrease the magnitude of magnetizing current.

Last Answer : The power transformer is a constant main flux device.

Last Answer : In a transformer, the tappings are generally provided on low voltage side.

Last Answer : The use of higher flux density in the transformer design reduces weight per kVA.

Last Answer : The chemical used in breather for transformer should have the quality of cleansing the transformer oil.

Last Answer : The transformer ratings are usually expressed in terms of kVA.

Last Answer : Material used for construction of transformer core is usually silicon steel.

Last Answer : The thickness of laminations used in a transformer is usually 0.4 mm to 0.5 mm.

Last Answer : conservator or a reservoir tank for insulating oil in transformer which used for balanced the onload oil level with help of oil level indicator which mount on middle part of reservoir tank.

Last Answer : A transformer oil must be free from moisture.

Last Answer : Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds 150°C.

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

Last Answer : Delta/star transformer works satisfactorily when on balanced as well as unbalanced loads.

Last Answer : The magnetising current of a transformer is usually small because it has small air gap.

Last Answer : The leakage flux in a transformer depends upon load current.