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

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1 answer 38 views

Increasing the number of turns of wire on the secondary of a transformer will  (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current

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A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

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lt the length, number of turns and area of a coil are  doubled, the inductance of the coil

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

asked Mar 19, 2018 in Transformer by Shimroz123
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Turns ratio

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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 figure. The magnetizing current drawn is 1A, and the secondary current is 1A. Ifcore losses and leakage reactances are neglected, the primary current is  A)1.41A B)2A C) 2.24A D)3A

asked May 20, 2018 in Transformer by Shimroz123
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A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

asked May 15, 2018 in Basic concepts by Shimroz123
1 answer 12 views

If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ohms? A.250 ohms B.25 ohms C.6,250 ohms D.62,500 ohms

asked May 15, 2018 in Basic concepts by Shimroz123
1 answer 25 views

In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of?

asked Mar 19, 2018 in Transformer by Shimroz123
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The path of magnetic flux in a transformer should have?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 17 views

The changes in the volume of transformer cooling oil due to the variation of atmospheric temperature during day and night is taken care of by which part of the transformer?

asked Mar 19, 2018 in Transformer by Zeeshan
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Part of the transformer which is most subject to damage from overheating is?

asked Mar 19, 2018 in Transformer by Shimroz123
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In a transformer the resistance between its primary and secondary should be?

asked Mar 19, 2018 in Transformer by Shimroz123
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If a transformer is continuously operated the maximum temperature rise will occur in?

asked Mar 19, 2018 in Transformer by Shimroz123
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The hum in a transformer is mainly attributed to?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 22 views

For a 100% efficient transformer, the primary winding has 1000 turns and the secondary 100 turns. If the power input to the above transformer is 1000 watts, the power output is_________.

asked Mar 31, 2018 in Electrical Engineering by Shimroz123

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