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Transformers

Transformers
The primary winding of a power transformer should always be

open
shorted
fused
switched

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Transformers
Transformer breaths in when

load on it decreases
load on it increases
load remains constant
None of these

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Transformers
A step up transformer increases

Frequency
Voltage
Power
Current

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Transformers
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 ?

250 Ω
25 Ω
62500 Ω
6250 Ω

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Transformers
Short circuit test on transformers is conducted to determine

hysteresis losses
core losses
eddy current losses
copper losses

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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?

880 V
8,800 V
8.8 V
88 V

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MORE MCQ ON Transformers

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