Please Log in or Register for more.


104 views

1 Answer

Answer :

Iron loss of a transformer can be measured by low power factor wattmeter.

Like 0 like

Please log in or register to answer this question.

Related Questions


In an actual transformer the iron loss remains practically constant from no load to full load because?
Last Answer : In an actual transformer the iron loss remains practically constant from no load to full load because core flux remains practically constant.

Show More

113 views 1 answer








Last Answer : If the supply frequency to the transformer is increased, the iron loss will increase.

Show More

170 views 1 answer







At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is :  (A) 7000 W (B) 6000 W (C) 8000 W (D) 4000 W
Last Answer : At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is : 6000 W

Show More

305 views 1 answer







Dielectric loss in a capacitor is best measured by (A) Wien Bridge (B) Schering Bridge (C) Anderson Bridge (D) Heaviside-Campbell Equal Ratio Bridge
Last Answer : Dielectric loss in a capacitor is best measured by Schering Bridge

Show More

139 views 1 answer







When secondary of a current transformer is open-circuited its iron core will be?
Last Answer : When secondary of a current transformer is open-circuited its iron core will be hot because of heavy iron losses taking place in it due to high flux density.

Show More

165 views 1 answer







A ferrite core has less eddy current loss than an iron core because?
Last Answer : A ferrite core has less eddy current loss than an iron core because ferrites have high hysteresis.

Show More

382 views 1 answer







A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is
Last Answer : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707

Show More

776 views 1 answer







How is energy measured ?
Last Answer : How is energy measured What is energy? Energy is the ability to do work and results in a change. It is a very commonly used word in our everyday lives. Different Forms of Energy Energy exists as ... for one hour. Horsepower is another unit of measuring energy. 1 HP is equivalent to 745.7 watts.

Show More

17 views 1 answer







The load of a consumer is generally measured in terms of : (A) Volts (B) Amperes (C) Ampere hour (D) kW
Last Answer : The load of a consumer is generally measured in terms of : kW

Show More

4.1k views 1 answer







True value has been 50 whereas measured value is 40 then the percentage error in the reading will be ______.  (A) 20% (B) 40% (C) 50% (D) 30%
Last Answer : True value has been 50 whereas measured value is 40 then the percentage error in the reading will be 20%. 

Show More

102 views 1 answer







In a battery, the difference between the no-load voltage and the measured voltage output is called ________ A) Internal voltage B) Internal resistance C) External resistance D) All the above
Last Answer : In a battery, the difference between the no-load voltage and the measured voltage output is called Internal resistance

Show More

123 views 1 answer







The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is (A) zero (B) 0.5 (C) between zero and 0.5 (D) between 0.5 and unity
Last Answer : The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is between 0.5 and unity

Show More

171 views 1 answer







The self inductance of a coil can be measured using (A) Wien’s Bridge (B) Schering Bridge (C) Anderson’s Bridge (D) Wheatstone Bridge
Last Answer : The self inductance of a coil can be measured using Anderson’s Bridge

Show More

174 views 1 answer







Liquid flow rate is measured using (A) a pirani gauge (B) a pyrometer (C) an orifice plate (D) a bourdon tube
Last Answer : Liquid flow rate is measured using an orifice plate

Show More

113 views 1 answer








Last Answer : E.m.f. of a Weston cell is accurately measured by electrostatic voltmeter.

Show More

206 views 1 answer








Last Answer : A direct current can be measured by a D.C. potentiometer in conjunction with a standard resistance.

Show More

108 views 1 answer








Last Answer : Resistances can be measured with the help of ohmmeters and resistance bridges.

Show More

90 views 1 answer







Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last Answer : Parts Insulating Materials  Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils.  ... Transformer bushings Porcelain  Insulation between transmission line and pole. Porcelain

Show More

199 views 1 answer








Last Answer : The full-load copper loss of a trans¬former is 1600 W. At half-load, the copper loss will be 400 W.

Show More

149 views 1 answer








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

Show More

205 views 1 answer








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

Show More

546 views 1 answer







Do you iron your clothes?
Last Answer : Lika hail no!

Show More

1 view 1 answer







Which Foods are Good Sources of Iron?
Last Answer : Google, Google and Google some more. I did this for iron rich foods just 2 days ago and there is a plethora of great information. Also, do what your Dr. told you, but I do find that slow release iron supplements (like slow-fe) are far easier on your system.

Show More

0 views 1 answer







How to Clean Wrought Iron
Last Answer : How to Clean Wrought Iron Items made from wrought iron can look beautiful, grand and elegant, but it only takes a few years for them to make your house looking like a haunted house more than an elegant ... of time. Chances are, you will just have to paint over the stains to cover them up completely.

Show More

8 views 1 answer







How to Iron Jeans ?
Last Answer : How to Iron Jeans There's nothing like a pair of thoroughly wrinkled jeans to make one look unkempt and unhygienic. Learn how to iron your jeans properly, which will only make you look good, but it will ... can last for a week. You can also opt to iron your jeans once a week, after laundering.

Show More

0 views 1 answer







How to Increase Iron in Your Diet ?
Last Answer : How to Increase Iron in Your Diet Iron is essential for the production of hemoglobin and myoglobin. These are important proteins needed in transporting oxygen throughout the body. Iron also improves ... iron sources in your diet to prevent acquiring diseases associated with low levels of iron.

Show More

4 views 1 answer







How to Iron a Shirt ?
Last Answer : How to Iron a Shirt If you want to learn how to iron your own clothes, shirts are a good starting point. Shirts are typically the easiest to iron, and can be done perfectly in a short time. Here' ... fabric and beads should have a towel on top for an indirect contact, with the iron on a low setting.

Show More

1 view 1 answer







How to Clean a Steam Iron ?
Last Answer : How to Clean a Steam Iron Ironing clothes with a steam iron is a relatively easy task, but if the appliance is not properly maintained, it will cause more harm than good. Steam irons become clogged ... ironing will not be a tedious task. Remember these steps and keep your steam iron in tiptop shape.

Show More

9 views 1 answer







What to look for when choosing an iron?
Last Answer : What to look for when choosing an iron? Today, the purchase of an iron is not a big problem. This piece of household appliances is presented in a wide range of stores. Each manufacturer tries to ... its presence increases the cost of the iron by an average of 10%. Good luck with your choice!

Show More

3 views 1 answer







Which is the best conductor: silver, carbon, or iron?
Last Answer : Silver is the best conductor. Carbon is the semiconductor. Iron have less conductance as compared to silver.

Show More

162 views 1 answer







An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field
Last Answer : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

Show More

334 views 1 answer







The iron alloy, ALNICO is mainly used to make ________ A) Temporary magnets B) Permanent magnets C) Transmission lines D) None of these
Last Answer : The iron alloy, ALNICO is mainly used to make Permanent magnets

Show More

88 views 1 answer







Eddy current damping cannot be used for moving iron instrument because
Last Answer : Eddy current damping cannot be used for moving iron instrument because the presence of a permanent magnet required for such purpose would affect the deflection and hence the reading of the instrument

Show More

2.3k views 1 answer







In DC motor iron losses are occurred in?
Last Answer : In DC motor iron losses are occurred in the armature.

Show More

138 views 1 answer







In AC. circuits, laminated iron is invariably used in order to?
Last Answer : In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

Show More

105 views 1 answer








Last Answer : A moving iron instrument can be used for both D.C. and A.C.

Show More

192 views 1 answer








Last Answer : Iron losses in a D.C. machine are independent of variations in load.

Show More

161 views 1 answer








Last Answer : In a D.C. generator, the iron losses mainly take place in armature rotor.

Show More

273 views 1 answer







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.

Show More

130 views 1 answer







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

Show More

154 views 1 answer







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.

Show More

54 views 1 answer







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%.

Show More

279 views 1 answer







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

Show More

381 views 2 answers







Single phase transformer
Last Answer : Single phase Transformer Transformer

Show More

261 views 1 answer







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. 

Show More

160 views 1 answer







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

Show More

248 views 1 answer













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.

Show More

181 views 1 answer







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.

Show More

132 views 1 answer







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

Show More

347 views 1 answer






Show More⇦ PreviousNext ⇨