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Transformers

Transformers
In a transformer the resistance between its primary and secondary is

Zero
1 ohm
Infinite
1000 ohms

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Transformers
The short circuit test helps us to find

None of the listed here
Iron loss at no load
Cu loss at any desire load
Cu loss at no load

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Transformers
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

one-fourth the primary current
four times the primary current
one-fourth the primary current and equal to the primary current
equal to the primary current

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Transformers
To step 110 V ac down to 20 V ac, the turns ratio must be

0.018
18
0.18
5.5

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Transformers
When load on a transformer is increased, the eddy current _____

Remains unchanged
Is increased
None of the listed here
Is decreased

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Transformers
Short circuit test of a transformer helps us to find its

Iron loss
None of the listed here
Full load cu loss
Cu loss at no load

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