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Transformers

Transformers
The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is

2 mH
4 μH
2 μH
8 μH

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Transformers
The maximum flux produced in the core of a transformer is ______

None of the listed here
Inversely proportional to primary voltage
Inversely proportional to supply frequency
Directly proportional to supply frequency

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Transformers
A transformer does not posses ______changing property.

Current
Power
Impedance
Voltage

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Transformers
The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns?

450
350
900
210

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Transformers
The highest voltage for transmitting electrical power in india is

400 kV
66 kV
132 kV
33 kV

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Transformers
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

88 V
8.8 V
8,800 V
880 V

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