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A power transmission line feeds input po...

A power transmission line feeds input power at 2300 V to a step down trnasformer with it primary windings having 4000 turns. What should be the number of turns in the seconday windings in order to get output power at 230 V?

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A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?

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The 300 turn primary of a transformer has resistnace 0.82Omega and the resistance of its secondary of 1200 turns is 6.2Omega . Find the voltage across the primary if the power output from the secondary at 1600 V is 32 kW. Calculate the power losses in both coils when the transformer efficiency is 80% .

A radio set operates at 6 V DC . A transformer with 18 turns in the secondary coil is used to step down the input 220 V AC emf to 6 V AC emf . This AC emf is then rectified by another circuit to give 6 V DC which is fed to the radio. Find the number of turns in the primary.

NCERT TAMIL-ALTERNATING CURRENT-ADDITIONAL EXERCISES
  1. An LC circuit contains a 20 mH inductor and a 50 mu F capacitor with a...

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  2. A coil of inductance 0.50H and resistance 100 Omega is connected to a ...

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  3. Obtain the answers to (a) and (b) Q.13, if the circuit is connected to...

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  4. A 100 muF capacitor in series with a 40 Omega resistance is connected ...

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  5. Obtain the answers to (a) and (b) in Q .15, if the circuit is connecte...

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  6. Keeping the source of frequency equal to the resonating frequency of t...

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  7. A circuit containing 0.1H inductor and a 500muF capacitor in series is...

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  8. Suppose the circuit in Exercise 7.18 has a resistance of 15 Omega Obta...

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  9. A series LCR circuit with L= 0.12H, C=480 nF, and R=23 Omega is connec...

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  10. Obtain the resonant frequency and Q – factor of a series LCR circuit w...

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  11. Answer the following questions : (a) In any a.c. circuit, is the app...

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  12. Answer the following questions : (a) In any a.c. circuit, is the app...

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  13. Answer the following questions : (a) In any a.c. circuit, is the app...

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  14. Answer the following questions : (a) In any a.c. circuit, is the app...

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  15. Answer the following questions : (a) In any a.c. circuit, is the app...

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  16. A power transmission line feeds input power at 2300 V to a step down t...

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  17. At a hydroelectric power plant, the water pressure head is at a height...

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  18. A small town with a demand of 800 kW of electric power at 220 V is sit...

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  19. Do the same exercise as above with the replacement of the earlier tran...

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