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Transformers

Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

0.2
5
25
0.4

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Transformers
A transformer does not posses ______changing property.

Power
Impedance
Current
Voltage

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Transformers
The highest voltage for transmitting electrical power in india is

66 kV
33 kV
132 kV
400 kV

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Transformers
Which motor is preferred for use in mines where explosive gases exist?

Synchronous motor
Induction motor
Shunt motor
Air motor

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Transformers
Short circuit test on transformers is conducted to determine

hysteresis losses
eddy current losses
copper losses
core losses

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Transformers
In a transformer routine efficiency depends upon

Both power factor and load current
Supply frequency
Load current
Power factor of load

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