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Transformers

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

8,800 V
88 V
8.8 V
880 V

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Transformers
In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

0 W
14.1 W
111.5 W
1,020 W

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

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

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Transformers
A transformer will work on

AC as well as DC
Ac only
None of the listed here
Dc only

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Transformers
Which winding in a transformer has more number of turns?

High voltage winding
Low voltage winding
Primary winding
Secondary winding

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Transformers
The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is

10 A
20 A
5 A
15 A

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