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Which of following quantities remains co...

Which of following quantities remains constant in transformer ?

A

Frequency

B

Voltage

C

Current

D

None of above

Text Solution

Verified by Experts

The correct Answer is:
A
Because transformer simply changes magnitude of current and voltage while being transferred from primary to secondary coil.
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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)
  1. In oscillator circuit, presence of .........are necessary

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  2. Generally, core of transformer is made up of ……...

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  3. Which of following quantities remains constant in transformer ?

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  4. Working of a transformer is based upon principle of …...

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  5. If NP and NS are respectively no. of turns in primary and secondary co...

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  6. Transformation ratio of one transformer is 1:2. If Leclanche cell havi...

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  7. 240 A.C. mains supply is given to one transformer which draws 0.7 A fr...

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  8. If the coils of a transformer are made up of thick wire, then ...

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  9. Which device is used to increase or decrease A.C. voltage ?

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  10. A step up transformer has transformation ratio of 3: 2. What is the vo...

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  11. A step-up transformer operates on a 230V line and supplies 2A to a loa...

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  12. 240 A.C. mains supply is given to one transformer which draws 0.7 A fr...

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  13. The ratio of primary and secondary turns in a transformer is 1: 200. I...

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  14. The ratio of primary and secondary turns in a transformer is 3:2, if 3...

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  15. If current is not obtained from secondary coil of an ideal transformer...

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  16. If number of turns in primary and secondary coils is increased to two ...

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  17. If for an ideal step-up transformer current in primary is IP and curre...

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  18. A transformer has an efficiency of 80%. It works at 100V and 4kW. If s...

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  19. For step-down transformer value of transformation ratio is ……….

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  20. In a step-up transformer, use of 120 V line provides a potential diffe...

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