Full load copper loss in a transformer is 1600 watts. At half load the copper loss will be:

Full load copper loss in a transformer is 1600 watts. At half load the copper loss will be: A) 6400 watt B) 1600 watt C) 800 watt D) 400 watt
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Answer :

 Full load cupper loss in a transformer is 1600 watts. At half load the cupper loss will be: 400 watt

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Related questions

The full-load copper loss of a transformer is 1600 W At half-load, the copper loss will be?

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

A 500 kVA, 3-phase transformer has iron losses of 300 W and full load copper losses of 600 W. The percentage

Description : A 500 kVA, 3-phase transformer has iron losses of 300 W and full load copper losses of 600 W. The percentage load at which the transformer is expected to have maximum efficiency is  (A) 50.0% (B) 70.7% (C) 141.4% (D) 200.0%

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73 The full load copper loss of a transformer is 1600W. At half-load the copper loss will be A. 6400W B. 1600W C. 800W D. 400W

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Last Answer : D. 400W

In an actual transformer the iron loss remains practically constant from no load to full load because?

Description : 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.

A single-phase transformer has no-load loss of 64 W, as obtained from an open circuit test. When a short-circuit

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A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity

Description : A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity power factor. If it is re-configured as a 500 V/750 V auto-transformer, its efficiency at its new rated load at unity power factor will be  (A) 95.752% (B) 97.851% (C) 98.276% (D) 99.241%

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In a transformer, zero voltage regulation at full load is

Description : In a transformer, zero voltage regulation at full load is   (a)Not possible   (b) Possible at unity power factor load   (c) Possible at leading power factor load   (d) Possible at lagging power factor load

Last Answer : In a transformer, zero voltage regulation at full load is Possible at leading power factor load 

The no-load current drawn by transformer is usually what per cent of the full-load current ?

Description :  The no-load current drawn by transformer is usually what per cent of the full-load current ?

Last Answer : 5 to 8 percentage of full load current

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Description : 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

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At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total

Description : 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

A transformer has maximum efficiency at 3/4 full load. The ratio of its iron losses and full load copper loss is : -

Description :  A transformer has maximum efficiency at 3/4 full load. The ratio of its iron losses and full load copper loss is : -  a) 16/9 b) 4 / 3 c) 3/4 d) 9 /16

Last Answer :  A transformer has maximum efficiency at 3/4 full load. The ratio of its iron losses and full load copper loss is : -  9 /16

Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?

Description : Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?

Last Answer : Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is approximately equal to 1.

5 The efficiency of a transformer is maximum when A. It runs at half full load B. it runs at full load C. its Cu loss equal iron loss D. it runs over load

Description : 5 The efficiency of a transformer is maximum when A. It runs at half full load B. it runs at full load C. its Cu loss equal iron loss D. it runs over load

Last Answer : C. Its cu loss equal iron loss

When two transformer of different kVA rating are connected in parallel they share the load in proportion to

Description : When two transformer of different kVA rating are connected in parallel they share the load in proportion to their respective kVA rating only when their:

Last Answer : When two transformer of different kVA rating are connected in parallel they share the load in proportion to their respective kVA rating only when their: P u impedance are equal

The core flux of a practical transformer with a resistive load

Description : The core flux of a practical transformer with a resistive load  A) Is strictly constant with load changes B) Increases linearly with load C) Increases as the square root of the load D) Decrease with increased load

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A single-phase transformer has a turns ratio of 1 :2 and is connected to a purely resistive load as shown in the

Description : A single-phase transformer has a turns ratio of 1 :2 and is connected to a purely resistive load as shown in the figure. The magnetizing current drawn is 1A, and the secondary current is 1A. Ifcore losses and ... reactances are neglected, the primary current is  A)1.41A B)2A C) 2.24A D)3A

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Which losses in a transformer varies significantly with load

Description : Which losses in a transformer varies significantly with load  a. Hysteresis losses b. Eddy current losses c. Copper losses d. Core losses 

Last Answer : Which losses in a transformer varies significantly with load Copper losses

For a constant load current, transformer maximum efficiency occurs at

Description : For a constant load current, transformer maximum efficiency occurs at   (a) any power factor (b) zero power factor leading (c) zero power factor lagging (d) unity power factor 

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No-load current in a transformer?

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

The no load current in a transformer lags behind the applied voltage by an angle of about?

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

No-load current of a transformer has?

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An ideal transformer will have maximum efficiency at a load such that?

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In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?

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For a transformer, operating at constant load current, maximum efficiency will occur at?

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The maximum load that a power transformer can carry is limited by its?

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Description : A no-load test is performed on a transformer to determine?

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If the supply frequency to the transformer is increased, the iron loss will?

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Iron loss of a transformer can be measured by?

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A properly matched transmission line has a loss of 1.5 dB/100m. if 10 W is supplied to one end of the line, how many watts reach the load, 27 m away? A. 10 W B. 7.2 W C. 9.9 W D. 9.1 W

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Last Answer : D. 9.1 W

52 A transformer has 1000 primary turns, connected to 250V ac supply. To get 400V secondary voltage the no of secondary turns should be A. 1600 B. 250 C. 400 D. 1250

Description : 52 A transformer has 1000 primary turns, connected to 250V ac supply. To get 400V secondary voltage the no of secondary turns should be A. 1600 B. 250 C. 400 D. 1250

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The transformer utilization factor of full wave bridge rectifier is

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If half life period of radium is 1600 years, its average life period will be:

Description : If half life period of radium is 1600 years, its average life period will be:

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A passenger train travelling at 96 kmph completely crosses another train having half its length and travelling in opposite direction at 84 kmph, in 24 seconds. It also passes a railway platform in 90 seconds. The length of the platform is A) 1250 m B) 2258m C) 1600 m D) 3725m

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A 50 KVA transformer has iron loss 2 kW on full load. Calculate its iron loss at 75% of full load.

Description : A 50 KVA transformer has iron loss 2 kW on full load. Calculate its iron loss at 75% of full load.

Last Answer : Iron loss is dependent on voltage and independent of load. Hence iron loss at 75% of Load = Iron loss at full load = 2 kW

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Explain direct loading test on single phase transformer with neat circuit diagram.

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Description : State two applications of isolation transformer

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

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%.

Equivalent circuit of transformer

Description : Equivalent circuit of transformer

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Description : Single phase transformer

Last Answer : Single phase Transformer Transformer

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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. 

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Description : Write about transformer on DC.

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