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

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The turns ratio required to match an 80 source to a 320 load is

Options

A : 80

B : 20

C : 4

D : 2

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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

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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

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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

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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

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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

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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

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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

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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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