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JE 2019 || Day 17 || Transformers Quiz 2
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Question 1
A single phase transformer with a ratio of 
has a load impedance of 
connected across the terminals of low voltage winding. The power delivered to the load is
has a load impedance of connected across the terminals of low voltage winding. The power delivered to the load is Question 2
The impedance reflected back to the source in Fig. is………………..
Question 3
The temperature rise of a transformer is directly proportional to………………………..
Question 4
A transformer will have zero efficiency at…………………….
Question 5
When load on a transformer is decreased, ………………..loss is decreased.
Question 6
An isolation transformer has primary to secondary turns ratio of
Question 7
A 
single-phase transformer has a primary resistance and inductive reactance of 
and 
respectively. The secondary values are 
and 
respectively. The equivalent impedance of the transformer referred to primary side is
single-phase transformer has a primary resistance and inductive reactance of and respectively. The secondary values are and respectively. The equivalent impedance of the transformer referred to primary side is Question 8
A 
source of internal resistance 
is connected to a load of 
through a transformer. For maximum power transfer, the turns ratio of the transformer should be
source of internal resistance is connected to a load of through a transformer. For maximum power transfer, the turns ratio of the transformer should be Question 9
A 
resistive load is to be impedance matched by a transformer to a source with 
of internal resistance. The ratio of primary to secondary turns of transformer should be
resistive load is to be impedance matched by a transformer to a source with of internal resistance. The ratio of primary to secondary turns of transformer should be Question 10
A 
transformer takes no-load current of 
and absorbs 187 W. If the resistance of the primary is 
what is the core loss?
transformer takes no-load current of and absorbs 187 W. If the resistance of the primary is what is the core loss? - 487 attempts
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ESE & GATE EEGeneralApr 17ESE & GATE EE
