Transformers - General Questions Online Exam Quiz
Transformers - General Questions GK Quiz. Question and Answers related to Transformers - General Questions. MCQ (Multiple Choice Questions with answers about Transformers - General Questions
What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?
Options
A : 4 kVA
B : 0.25 kVA
C : 16 kVA
D : 8 kVA
The turns ratio required to match an 80 source to a 320 load is
Options
A : 80
B : 20
C : 4
D : 2
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
Options
A : 12 V
B : 120 V
C : 240 V
D : 2,400 V
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 ?
Options
A : 250
B : 25
C : 6,250
D : 62,500
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is
Options
A : 0.2
B : 0.4
C : 5
D : 25
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?
Options
A : 8.8 V
B : 88 V
C : 880 V
D : 8,800 V
To step 110 V ac down to 20 V ac, the turns ratio must be
Options
A : 5.5
B : 18
C : 0.18
D : 0.018
The mutual inductance when k = 0.65, L 1 = 2 H, and L 2 = 5 H is
Options
A : 2 mH
B : 2 H
C : 4 H
D : 8 H
If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is
Options
A : 25 W
B : 0 W
C : 250 W
D : 2.5 W
A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, R L , is 120 . What is the approximate voltage across the load?
Options
A : 7.3 V
B : 73 V
C : 88 V
D : 880 V
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