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A step-down transformer is connected to ...

A step-down transformer is connected to `2400` volts line and `80` amperes of current is found to flow in output load. The ratio of the turns in primary and secondary coil is `20:1.` if transformer efficiency is `100%`, then the current flowing in primary coil will be

A

1600 amp

B

20 amp

C

4 amp

D

1.5 amp

Text Solution

Verified by Experts

The correct Answer is:
C
`(I_(S))/(I_(P)) = (n_(P))/(n_(s)), (80)/(I_(p)) = (20)/(1) or I_(p) = 4 amp`
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DISHA PUBLICATION-ALTERNATING CURRENT -Exercise - 1 : CONCEPT BUILDER (Topic 3 : Transformers and LC Oscillations)
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  8. In an oscillating LC circuit with L = 50 mH and C = 4.0 mu F, the cur...

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  9. An alternating current emf device has a smaller resistance than that o...

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  10. A choke coil and capacitor are connected in series and the current thr...

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  11. In an oscillating LC circuit the maximum charge on the capacitor is Q....

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  12. If the total charge stored in the LC circuit is Q(0), then for tgt= 0

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  13. At t lt 0, the capacitor is charged and the switch is opened.At t = 0 ...

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  14. In an ideal transformer, the voltagae and the current in the primary c...

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  15. The tuning circuit of a radio receiver has a resistance of 50Omega , a...

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  16. A step-down transformer is connected to 2400 volts line and 80 amperes...

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  17. The primary winding of a transformer has 100 turns and its secondary w...

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  18. Figure shows an iron-cored transformer assumed to be 100% efficient. T...

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  19. The output of a step-down transformer is measured to be 24 V when conn...

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