What is the output voltage of the secondary

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Reference no: EM132039843

Questions -

Q1. What is the efficiency of a transformer that has an input of 600 VA and an output to a load of 580 VA?

A. 20 VA

B. 83.8%

C. 96.6%

D. 180 VA

Q2. If 120 VAC is applied to a transformer with a turns ratio of 6 : 1, what type of transformer is present and what is the output voltage of the secondary?

A. Step-down, 60 VAC

B. Step-up, 600 VAC

C. Step-down, 20 VAC

D. Step-up, 720 VAC

Q3. The primary current drawn by the transformer shown will be

A. 2 A.

B.10 A.

C. 5 A.

D. 50 A.

Q4. If the power in the primary circuit of a 4 : 1 transformer is 12 watts, what will be the power in the secondary of this transformer?

A. 12 watts

B. 3 watts

C. 4 watts

D. 48 watts

Q5. If the turns ratio of a transformer is 4 : 1 and the incoming voltage is 120 VAC. what Is the secondary voltage?

A. 240 VAC

B. 120 VAC

C. 480 VAC

D. 30 VAC

Q6. The secondary line-to-line voltage of a three-phase Y-Y-connected transformer bank is 115 VAC. What would be the secondary line to neutral voltage?

A. 199.2 V

B. 66.4 V

C. 50 V

D. 84.2 V

Q7. Three single-phase transformers, each having a secondary phase current of 10 A, are Delta-Delta-connected. The value of the secondary line current is

A. 57.8 A.

B. 1.73 A.

C. 17.3 A.

D. 578 A.

Reference no: EM132039843

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