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Transformers
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is
13 Ω
7.8 Ω
78 Ω
1.3 Ω
13 Ω
7.8 Ω
78 Ω
1.3 Ω
Answer
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Related Question
Transformers
The permissible flux density in case of cold rolled grain oriented steel is around
2.7 Wb/m²
4.7 Wb/m²
3.7 Wb/m²
1.7 Wb/m²
2.7 Wb/m²
4.7 Wb/m²
3.7 Wb/m²
1.7 Wb/m²
Answer
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Transformers
The effect of leakage flux in a transformer is to ______
None of the listed here
Cause voltage drop in the windings
Decreases copper losses
Increase copper losses
None of the listed here
Cause voltage drop in the windings
Decreases copper losses
Increase copper losses
Answer
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Transformers
The core type transformer provides _______
None of the listed here
Shorter magnetic path
Much longer magnetic path
Lesser average length per turn
None of the listed here
Shorter magnetic path
Much longer magnetic path
Lesser average length per turn
Answer
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Transformers
To step 110 V ac down to 20 V ac, the turns ratio must be
5.5
18
0.018
0.18
5.5
18
0.018
0.18
Answer
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Transformers
A transformer will work on
AC as well as DC
Dc only
Ac only
None of the listed here
AC as well as DC
Dc only
Ac only
None of the listed here
Answer
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