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A radio set operates at 6 V DC. A transf...

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.

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We have,
`|(epsilon_2)/(epsilon_1)| = N_2/N_1` epsilon or, `N_1 = |(epsilon_1)/(epsilon_2)| N_2 = 220/6 xx 18 = 660`
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HC VERMA-ALTERNATING CURRENT-Exercises
  1. A radio set operates at 6 V DC. A transformer with 18 turns in the sec...

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  2. Find the time required for a 50Hz alternating current to become its va...

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  3. The household supply of electricity is at 220 V (rms value) and 50 Hz....

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  4. A bulb rated 60 W at 220 V is connected across a household supply of a...

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  5. An electric bulb is designed to operate at 12 v DC. If this bulb is c...

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  6. The peak power consumed by a resistive coil when connected to an AC so...

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  7. The dielectric strength of air is 3.0 xx 10^6 V/m. A parallel-plate ai...

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  8. The electric current in a circuit is given by I = i0 (t/(tau)) for som...

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  9. A capacitor of capacitance 10 muF is connected to an oscillator giving...

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  10. A coil of inductance 5.0 mH and negligible resistance is connected to ...

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  11. A coil has a resistance of 10 Omega and an inductance of 0.4 henry. It...

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  12. A resistor of resistance 100 Omega is connected to an AC source epsilo...

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  13. In a series RC circuit with an AC source, R = 300 Omega, C = 25 muF, e...

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  14. An electric bulb is designed to consume 55 W when operated at 110 volt...

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  15. In a series LCR circuit with an AC source, R = 300 Omega, C = 20 muF, ...

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  16. Consider the situation of the previous problem. Find the average elect...

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  17. An inductance of 2.0 H, a capacitance of 18 muF and a resistance of 10...

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  18. A coil a capacitor and an AC source of rms voltage 24 V are connected ...

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  19. Figure shows a typical circuit for low-pass filter. An AC input Vi = 1...

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  20. A transformer has 50 turns in the primary and 100 in the secondary. If...

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